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solar.el fixes.
[emacs.git] / lisp / calc / calc-graph.el
blobd5d8f0aaf35873b974d00dd685731dc779dc5e6d
1 ;;; calc-graph.el --- graph output functions for Calc
2
3 ;; Copyright (C) 1990-1993, 2001-2011 Free Software Foundation, Inc.
4
5 ;; Author: David Gillespie <daveg@synaptics.com>
6 ;; Maintainer: Jay Belanger <jay.p.belanger@gmail.com>
7
8 ;; This file is part of GNU Emacs.
9
10 ;; GNU Emacs is free software: you can redistribute it and/or modify
11 ;; it under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation, either version 3 of the License, or
13 ;; (at your option) any later version.
14
15 ;; GNU Emacs is distributed in the hope that it will be useful,
16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ;; GNU General Public License for more details.
19
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
22
23 ;;; Commentary:
24
25 ;;; Code:
26
27 ;; This file is autoloaded from calc-ext.el.
28
29 (require 'calc-ext)
30 (require 'calc-macs)
31
32 ;;; Graphics
33
34 ;; The following three variables are customizable and defined in calc.el.
35 (defvar calc-gnuplot-name)
36 (defvar calc-gnuplot-plot-command)
37 (defvar calc-gnuplot-print-command)
38
39 (defvar calc-gnuplot-tempfile "calc")
40
41 (defvar calc-gnuplot-default-device)
42 (defvar calc-gnuplot-default-output)
43 (defvar calc-gnuplot-print-device)
44 (defvar calc-gnuplot-print-output)
45 (defvar calc-gnuplot-keep-outfile nil)
46 (defvar calc-gnuplot-version nil)
47
48 (defvar calc-gnuplot-display (getenv "DISPLAY"))
49 (defvar calc-gnuplot-geometry)
50
51 (defvar calc-graph-default-resolution)
52 (defvar calc-graph-default-resolution-3d)
53 (defvar calc-graph-default-precision 5)
54
55 (defvar calc-gnuplot-buffer nil)
56 (defvar calc-gnuplot-input nil)
57
58 (defvar calc-gnuplot-last-error-pos 1)
59 (defvar calc-graph-last-device nil)
60 (defvar calc-graph-last-output nil)
61 (defvar calc-graph-file-cache nil)
62 (defvar calc-graph-var-cache nil)
63 (defvar calc-graph-data-cache nil)
64 (defvar calc-graph-data-cache-limit 10)
65 (defvar calc-graph-no-auto-view nil)
66 (defvar calc-graph-no-wait nil)
67 (defvar calc-gnuplot-trail-mark)
68
69 (defun calc-graph-fast (many)
70 (interactive "P")
71 (let ((calc-graph-no-auto-view t))
72 (calc-graph-delete t)
73 (calc-graph-add many)
74 (calc-graph-plot nil)))
75
76 (defun calc-graph-fast-3d (many)
77 (interactive "P")
78 (let ((calc-graph-no-auto-view t))
79 (calc-graph-delete t)
80 (calc-graph-add-3d many)
81 (calc-graph-plot nil)))
82
83 (defun calc-graph-delete (all)
84 (interactive "P")
85 (calc-wrapper
86 (calc-graph-init)
87 (with-current-buffer calc-gnuplot-input
88 (and (calc-graph-find-plot t all)
89 (progn
90 (if (looking-at "s?plot")
91 (progn
92 (setq calc-graph-var-cache nil)
93 (delete-region (point) (point-max)))
94 (delete-region (point) (1- (point-max)))))))
95 (calc-graph-view-commands)))
96
97 (defun calc-graph-find-plot (&optional before all)
98 (goto-char (point-min))
99 (and (re-search-forward "^s?plot[ \t]+" nil t)
100 (let ((beg (point)))
101 (goto-char (point-max))
102 (if (or all
103 (not (search-backward "," nil t))
104 (< (point) beg))
105 (progn
106 (goto-char beg)
107 (if before
108 (beginning-of-line)))
109 (or before
110 (re-search-forward ",[ \t]+")))
111 t)))
112
113 (defun calc-graph-add (many)
114 (interactive "P")
115 (calc-wrapper
116 (calc-graph-init)
117 (cond ((null many)
118 (calc-graph-add-curve (calc-graph-lookup (calc-top-n 2))
119 (calc-graph-lookup (calc-top-n 1))))
120 ((or (consp many) (eq many 0))
121 (let ((xdata (calc-graph-lookup (calc-top-n 2)))
122 (ylist (calc-top-n 1)))
123 (or (eq (car-safe ylist) 'vec)
124 (error "Y argument must be a vector"))
125 (while (setq ylist (cdr ylist))
126 (calc-graph-add-curve xdata (calc-graph-lookup (car ylist))))))
127 ((> (setq many (prefix-numeric-value many)) 0)
128 (let ((xdata (calc-graph-lookup (calc-top-n (1+ many)))))
129 (while (> many 0)
130 (calc-graph-add-curve xdata
131 (calc-graph-lookup (calc-top-n many)))
132 (setq many (1- many)))))
133 (t
134 (let (pair)
135 (setq many (- many))
136 (while (> many 0)
137 (setq pair (calc-top-n many))
138 (or (and (eq (car-safe pair) 'vec)
139 (= (length pair) 3))
140 (error "Argument must be an [x,y] vector"))
141 (calc-graph-add-curve (calc-graph-lookup (nth 1 pair))
142 (calc-graph-lookup (nth 2 pair)))
143 (setq many (1- many))))))
144 (calc-graph-view-commands)))
145
146 (defun calc-graph-add-3d (many)
147 (interactive "P")
148 (calc-wrapper
149 (calc-graph-init)
150 (cond ((null many)
151 (calc-graph-add-curve (calc-graph-lookup (calc-top-n 3))
152 (calc-graph-lookup (calc-top-n 2))
153 (calc-graph-lookup (calc-top-n 1))))
154 ((or (consp many) (eq many 0))
155 (let ((xdata (calc-graph-lookup (calc-top-n 3)))
156 (ydata (calc-graph-lookup (calc-top-n 2)))
157 (zlist (calc-top-n 1)))
158 (or (eq (car-safe zlist) 'vec)
159 (error "Z argument must be a vector"))
160 (while (setq zlist (cdr zlist))
161 (calc-graph-add-curve xdata ydata
162 (calc-graph-lookup (car zlist))))))
163 ((> (setq many (prefix-numeric-value many)) 0)
164 (let ((xdata (calc-graph-lookup (calc-top-n (+ many 2))))
165 (ydata (calc-graph-lookup (calc-top-n (+ many 1)))))
166 (while (> many 0)
167 (calc-graph-add-curve xdata ydata
168 (calc-graph-lookup (calc-top-n many)))
169 (setq many (1- many)))))
170 (t
171 (let (curve)
172 (setq many (- many))
173 (while (> many 0)
174 (setq curve (calc-top-n many))
175 (or (and (eq (car-safe curve) 'vec)
176 (= (length curve) 4))
177 (error "Argument must be an [x,y,z] vector"))
178 (calc-graph-add-curve (calc-graph-lookup (nth 1 curve))
179 (calc-graph-lookup (nth 2 curve))
180 (calc-graph-lookup (nth 3 curve)))
181 (setq many (1- many))))))
182 (calc-graph-view-commands)))
183
184 (defun calc-graph-add-curve (xdata ydata &optional zdata)
185 (let ((num (calc-graph-count-curves))
186 (pstyle (calc-var-value 'var-PointStyles))
187 (lstyle (calc-var-value 'var-LineStyles)))
188 (with-current-buffer calc-gnuplot-input
189 (goto-char (point-min))
190 (if (re-search-forward (if zdata "^plot[ \t]" "^splot[ \t]")
191 nil t)
192 (error "Can't mix 2d and 3d curves on one graph"))
193 (if (re-search-forward "^s?plot[ \t]" nil t)
194 (progn
195 (end-of-line)
196 (insert ", "))
197 (goto-char (point-max))
198 (or (eq (preceding-char) ?\n)
199 (insert "\n"))
200 (insert (if zdata "splot" "plot") " \n")
201 (forward-char -1))
202 (insert "{" (symbol-name (nth 1 xdata))
203 ":" (symbol-name (nth 1 ydata)))
204 (if zdata
205 (insert ":" (symbol-name (nth 1 zdata))))
206 (insert "} "
207 "title \"" (symbol-name (nth 1 ydata)) "\" "
208 "with dots")
209 (setq pstyle (and (eq (car-safe pstyle) 'vec) (nth (1+ num) pstyle)))
210 (setq lstyle (and (eq (car-safe lstyle) 'vec) (nth (1+ num) lstyle))))
211 (calc-graph-set-styles
212 (or (and (Math-num-integerp lstyle) (math-trunc lstyle))
213 0)
214 (or (and (Math-num-integerp pstyle) (math-trunc pstyle))
215 (if (eq (car-safe (calc-var-value (nth 2 ydata))) 'vec)
216 0 -1))
217 (math-contains-sdev-p (eval (nth 2 ydata))))))
218
219 (defun calc-graph-lookup (thing)
220 (if (and (eq (car-safe thing) 'var)
221 (calc-var-value (nth 2 thing)))
222 thing
223 (let ((found (assoc thing calc-graph-var-cache)))
224 (or found
225 (let ((varname (concat "PlotData"
226 (int-to-string
227 (1+ (length calc-graph-var-cache)))))
228 var)
229 (setq var (list 'var (intern varname)
230 (intern (concat "var-" varname)))
231 found (cons thing var)
232 calc-graph-var-cache (cons found calc-graph-var-cache))
233 (set (nth 2 var) thing)))
234 (cdr found))))
235
236 (defun calc-graph-juggle (arg)
237 (interactive "p")
238 (calc-graph-init)
239 (with-current-buffer calc-gnuplot-input
240 (if (< arg 0)
241 (let ((num (calc-graph-count-curves)))
242 (if (> num 0)
243 (while (< arg 0)
244 (setq arg (+ arg num))))))
245 (while (>= (setq arg (1- arg)) 0)
246 (calc-graph-do-juggle))))
247
248 (defun calc-graph-count-curves ()
249 (with-current-buffer calc-gnuplot-input
250 (if (re-search-forward "^s?plot[ \t]" nil t)
251 (let ((num 1))
252 (goto-char (point-min))
253 (while (search-forward "," nil t)
254 (setq num (1+ num)))
255 num)
256 0)))
257
258 (defun calc-graph-do-juggle ()
259 (let (base)
260 (and (calc-graph-find-plot t t)
261 (progn
262 (setq base (point))
263 (calc-graph-find-plot t nil)
264 (or (eq base (point))
265 (let ((str (buffer-substring (+ (point) 2) (1- (point-max)))))
266 (delete-region (point) (1- (point-max)))
267 (goto-char (+ base 5))
268 (insert str ", ")))))))
269
270 (defun calc-graph-print (flag)
271 (interactive "P")
272 (calc-graph-plot flag t))
273
274 (defvar var-DUMMY)
275 (defvar var-DUMMY2)
276 (defvar var-PlotRejects)
277
278 ;; The following variables are local to calc-graph-plot, but are
279 ;; used in the functions calc-graph-compute-2d, calc-graph-refine-2d,
280 ;; calc-graph-recompute-2d, calc-graph-compute-3d and
281 ;; calc-graph-format-data, which are called by calc-graph-plot.
282 (defvar calc-graph-yvalue)
283 (defvar calc-graph-yvec)
284 (defvar calc-graph-numsteps)
285 (defvar calc-graph-numsteps3)
286 (defvar calc-graph-xvalue)
287 (defvar calc-graph-xvec)
288 (defvar calc-graph-xname)
289 (defvar calc-graph-yname)
290 (defvar calc-graph-xstep)
291 (defvar calc-graph-ycache)
292 (defvar calc-graph-ycacheptr)
293 (defvar calc-graph-refine)
294 (defvar calc-graph-keep-file)
295 (defvar calc-graph-xval)
296 (defvar calc-graph-xlow)
297 (defvar calc-graph-xhigh)
298 (defvar calc-graph-yval)
299 (defvar calc-graph-yp)
300 (defvar calc-graph-xp)
301 (defvar calc-graph-zp)
302 (defvar calc-graph-yvector)
303 (defvar calc-graph-resolution)
304 (defvar calc-graph-y3value)
305 (defvar calc-graph-y3name)
306 (defvar calc-graph-y3step)
307 (defvar calc-graph-zval)
308 (defvar calc-graph-stepcount)
309 (defvar calc-graph-is-splot)
310 (defvar calc-graph-surprise-splot)
311 (defvar calc-graph-blank)
312 (defvar calc-graph-non-blank)
313 (defvar calc-graph-curve-num)
314
315 (defun calc-graph-plot (flag &optional printing)
316 (interactive "P")
317 (calc-slow-wrapper
318 (let ((calcbuf (current-buffer))
319 (tempbuf (get-buffer-create "*Gnuplot Temp-2*"))
320 (tempbuftop 1)
321 (tempoutfile nil)
322 (calc-graph-curve-num 0)
323 (calc-graph-refine (and flag (> (prefix-numeric-value flag) 0)))
324 (recompute (and flag (< (prefix-numeric-value flag) 0)))
325 (calc-graph-surprise-splot nil)
326 (tty-output nil)
327 cache-env calc-graph-is-splot device output calc-graph-resolution precision samples-pos)
328 (add-hook 'kill-emacs-hook 'calc-graph-kill-hook)
329 (save-excursion
330 (calc-graph-init)
331 (set-buffer tempbuf)
332 (erase-buffer)
333 (set-buffer calc-gnuplot-input)
334 (goto-char (point-min))
335 (setq calc-graph-is-splot (re-search-forward "^splot[ \t]" nil t))
336 (let ((str (buffer-string))
337 (ver calc-gnuplot-version))
338 (set-buffer (get-buffer-create "*Gnuplot Temp*"))
339 (erase-buffer)
340 (insert "# (Note: This is a temporary copy---do not edit!)\n")
341 (if (>= ver 2)
342 (insert "set noarrow\nset nolabel\n"
343 "set autoscale xy\nset nologscale xy\n"
344 "set xlabel\nset ylabel\nset title\n"
345 "set noclip points\nset clip one\nset clip two\n"
346 "set format \"%g\"\nset tics\nset xtics\nset ytics\n"
347 "set style data linespoints\n"
348 "set nogrid\nset nokey\nset nopolar\n"))
349 (if (>= ver 3)
350 (insert "set surface\nset nocontour\n"
351 "set " (if calc-graph-is-splot "" "no") "parametric\n"
352 "set notime\nset border\nset ztics\nset zeroaxis\n"
353 "set view 60,30,1,1\nset offsets 0,0,0,0\n"))
354 (setq samples-pos (point))
355 (insert "\n\n" str))
356 (goto-char (point-min))
357 (if calc-graph-is-splot
358 (if calc-graph-refine
359 (error "This option works only for 2d plots")
360 (setq recompute t)))
361 (let ((calc-gnuplot-input (current-buffer))
362 (calc-graph-no-auto-view t))
363 (if printing
364 (setq device calc-gnuplot-print-device
365 output calc-gnuplot-print-output)
366 (setq device (calc-graph-find-command "terminal")
367 output (calc-graph-find-command "output"))
368 (or device
369 (setq device calc-gnuplot-default-device))
370 (if output
371 (setq output (car (read-from-string output)))
372 (setq output calc-gnuplot-default-output)))
373 (if (or (equal device "") (equal device "default"))
374 (setq device
375 (cond
376 (printing "postscript")
377 ;; Check MS-Windows before X, in case they have
378 ;; $DISPLAY set for some reason (e.g., Cygwin or
379 ;; whatever)
380 ((string= calc-gnuplot-name "pgnuplot")
381 "windows")
382 ((or (eq window-system 'x) (getenv "DISPLAY"))
383 "x11")
384 ((>= calc-gnuplot-version 3)
385 "dumb")
386 (t "postscript"))))
387 (if (equal device "dumb")
388 (setq device (format "dumb %d %d"
389 (1- (frame-width)) (1- (frame-height)))))
390 (if (equal device "big")
391 (setq device (format "dumb %d %d"
392 (* 4 (- (frame-width) 3))
393 (* 4 (- (frame-height) 3)))))
394 (if (stringp output)
395 (if (or (equal output "auto")
396 (and (equal output "tty") (setq tty-output t)))
397 (setq tempoutfile (calc-temp-file-name -1)
398 output tempoutfile))
399 (setq output (eval output)))
400 (or (equal device calc-graph-last-device)
401 (progn
402 (setq calc-graph-last-device device)
403 (calc-gnuplot-command "set terminal" device)))
404 (or (equal output calc-graph-last-output)
405 (progn
406 (setq calc-graph-last-output output)
407 (calc-gnuplot-command "set output"
408 (if (equal output "STDOUT")
409 ""
410 (prin1-to-string output)))))
411 (setq calc-graph-resolution (calc-graph-find-command "samples"))
412 (if calc-graph-resolution
413 (setq calc-graph-resolution (string-to-number calc-graph-resolution))
414 (setq calc-graph-resolution (if calc-graph-is-splot
415 calc-graph-default-resolution-3d
416 calc-graph-default-resolution)))
417 (setq precision (calc-graph-find-command "precision"))
418 (if precision
419 (setq precision (string-to-number precision))
420 (setq precision calc-graph-default-precision))
421 (calc-graph-set-command "terminal")
422 (calc-graph-set-command "output")
423 (calc-graph-set-command "samples")
424 (calc-graph-set-command "precision"))
425 (goto-char samples-pos)
426 (insert "set samples " (int-to-string (max (if calc-graph-is-splot 20 200)
427 (+ 5 calc-graph-resolution))) "\n")
428 (while (re-search-forward "{\\*[^}]+}[^,\n]*" nil t)
429 (delete-region (match-beginning 0) (match-end 0))
430 (if (looking-at ",")
431 (delete-char 1)
432 (while (memq (preceding-char) '(?\s ?\t))
433 (forward-char -1))
434 (if (eq (preceding-char) ?\,)
435 (delete-char -1))))
436 (with-current-buffer calcbuf
437 (setq cache-env (list calc-angle-mode
438 calc-complex-mode
439 calc-simplify-mode
440 calc-infinite-mode
441 calc-word-size
442 precision calc-graph-is-splot))
443 (if (and (not recompute)
444 (equal (cdr (car calc-graph-data-cache)) cache-env))
445 (while (> (length calc-graph-data-cache)
446 calc-graph-data-cache-limit)
447 (setcdr calc-graph-data-cache
448 (cdr (cdr calc-graph-data-cache))))
449 (setq calc-graph-data-cache (list (cons nil cache-env)))))
450 (calc-graph-find-plot t t)
451 (while (re-search-forward
452 (if calc-graph-is-splot
453 "{\\([^{}:\n]+\\):\\([^{}:\n]+\\):\\([^{}:\n]+\\)}"
454 "{\\([^{}:\n]+\\)\\(:\\)\\([^{}:\n]+\\)}")
455 nil t)
456 (setq calc-graph-curve-num (1+ calc-graph-curve-num))
457 (let* ((calc-graph-xname (buffer-substring (match-beginning 1) (match-end 1)))
458 (xvar (intern (concat "var-" calc-graph-xname)))
459 (calc-graph-xvalue (math-evaluate-expr (calc-var-value xvar)))
460 (calc-graph-y3name (and calc-graph-is-splot
461 (buffer-substring (match-beginning 2)
462 (match-end 2))))
463 (y3var (and calc-graph-is-splot (intern (concat "var-" calc-graph-y3name))))
464 (calc-graph-y3value (and calc-graph-is-splot (calc-var-value y3var)))
465 (calc-graph-yname (buffer-substring (match-beginning 3) (match-end 3)))
466 (yvar (intern (concat "var-" calc-graph-yname)))
467 (calc-graph-yvalue (calc-var-value yvar))
468 filename)
469 (delete-region (match-beginning 0) (match-end 0))
470 (setq filename (calc-temp-file-name calc-graph-curve-num))
471 (with-current-buffer calcbuf
472 (let (tempbuftop
473 (calc-graph-xp calc-graph-xvalue)
474 (calc-graph-yp calc-graph-yvalue)
475 (calc-graph-zp nil)
476 (calc-graph-xlow nil) (calc-graph-xhigh nil) (y3low nil) (y3high nil)
477 calc-graph-xvec calc-graph-xval calc-graph-xstep var-DUMMY
478 y3val calc-graph-y3step var-DUMMY2 (calc-graph-zval nil)
479 calc-graph-yvec calc-graph-yval calc-graph-ycache calc-graph-ycacheptr calc-graph-yvector
480 calc-graph-numsteps calc-graph-numsteps3
481 (calc-graph-keep-file (and (not calc-graph-is-splot) (file-exists-p filename)))
482 (calc-graph-stepcount 0)
483 (calc-symbolic-mode nil)
484 (calc-prefer-frac nil)
485 (calc-internal-prec (max 3 precision))
486 (calc-simplify-mode (and (not (memq calc-simplify-mode
487 '(none num)))
488 calc-simplify-mode))
489 (calc-graph-blank t)
490 (calc-graph-non-blank nil)
491 (math-working-step 0)
492 (math-working-step-2 nil))
493 (save-excursion
494 (if calc-graph-is-splot
495 (calc-graph-compute-3d)
496 (calc-graph-compute-2d))
497 (set-buffer tempbuf)
498 (goto-char (point-max))
499 (insert "\n" calc-graph-xname)
500 (if calc-graph-is-splot
501 (insert ":" calc-graph-y3name))
502 (insert ":" calc-graph-yname "\n\n")
503 (setq tempbuftop (point))
504 (let ((calc-group-digits nil)
505 (calc-leading-zeros nil)
506 (calc-number-radix 10)
507 (calc-twos-complement-mode nil)
508 (entry (and (not calc-graph-is-splot)
509 (list calc-graph-xp calc-graph-yp calc-graph-xhigh calc-graph-numsteps))))
510 (or (equal entry
511 (nth 1 (nth (1+ calc-graph-curve-num)
512 calc-graph-file-cache)))
513 (setq calc-graph-keep-file nil))
514 (setcar (cdr (nth (1+ calc-graph-curve-num) calc-graph-file-cache))
515 entry)
516 (or calc-graph-keep-file
517 (calc-graph-format-data)))
518 (or calc-graph-keep-file
519 (progn
520 (or calc-graph-non-blank
521 (error "No valid data points for %s:%s"
522 calc-graph-xname calc-graph-yname))
523 (write-region tempbuftop (point-max) filename
524 nil 'quiet))))))
525 (insert (prin1-to-string filename))))
526 (if calc-graph-surprise-splot
527 (setcdr cache-env nil))
528 (if (= calc-graph-curve-num 0)
529 (progn
530 (calc-gnuplot-command "clear")
531 (calc-clear-command-flag 'clear-message)
532 (message "No data to plot!"))
533 (setq calc-graph-data-cache-limit (max calc-graph-curve-num
534 calc-graph-data-cache-limit))
535 (let ((filename (calc-temp-file-name 0)))
536 (write-region (point-min) (point-max) filename nil 'quiet)
537 (calc-gnuplot-command "load" (prin1-to-string filename)))
538 (or (equal output "STDOUT")
539 calc-gnuplot-keep-outfile
540 (progn ; need to close the output file before printing/plotting
541 (setq calc-graph-last-output "STDOUT")
542 (calc-gnuplot-command "set output")))
543 (let ((command (if printing
544 calc-gnuplot-print-command
545 (or calc-gnuplot-plot-command
546 (and (string-match "^dumb" device)
547 'calc-graph-show-dumb)
548 (and tty-output
549 'calc-graph-show-tty)))))
550 (if command
551 (if (stringp command)
552 (calc-gnuplot-command
553 "!" (format command
554 (or tempoutfile
555 calc-gnuplot-print-output)))
556 (if (symbolp command)
557 (funcall command output)
558 (eval command))))))))))
559
560 (defun calc-graph-compute-2d ()
561 (if (setq calc-graph-yvec (eq (car-safe calc-graph-yvalue) 'vec))
562 (if (= (setq calc-graph-numsteps (1- (length calc-graph-yvalue))) 0)
563 (error "Can't plot an empty vector")
564 (if (setq calc-graph-xvec (eq (car-safe calc-graph-xvalue) 'vec))
565 (or (= (1- (length calc-graph-xvalue)) calc-graph-numsteps)
566 (error "%s and %s have different lengths" calc-graph-xname calc-graph-yname))
567 (if (and (eq (car-safe calc-graph-xvalue) 'intv)
568 (math-constp calc-graph-xvalue))
569 (setq calc-graph-xstep (math-div (math-sub (nth 3 calc-graph-xvalue)
570 (nth 2 calc-graph-xvalue))
571 (1- calc-graph-numsteps))
572 calc-graph-xvalue (nth 2 calc-graph-xvalue))
573 (if (math-realp calc-graph-xvalue)
574 (setq calc-graph-xstep 1)
575 (error "%s is not a suitable basis for %s" calc-graph-xname calc-graph-yname)))))
576 (or (math-realp calc-graph-yvalue)
577 (let ((math-arglist nil))
578 (setq calc-graph-yvalue (math-evaluate-expr calc-graph-yvalue))
579 (calc-default-formula-arglist calc-graph-yvalue)
580 (or math-arglist
581 (error "%s does not contain any unassigned variables" calc-graph-yname))
582 (and (cdr math-arglist)
583 (error "%s contains more than one variable: %s"
584 calc-graph-yname math-arglist))
585 (setq calc-graph-yvalue (math-expr-subst calc-graph-yvalue
586 (math-build-var-name (car math-arglist))
587 '(var DUMMY var-DUMMY)))))
588 (setq calc-graph-ycache (assoc calc-graph-yvalue calc-graph-data-cache))
589 (delq calc-graph-ycache calc-graph-data-cache)
590 (nconc calc-graph-data-cache
591 (list (or calc-graph-ycache (setq calc-graph-ycache (list calc-graph-yvalue)))))
592 (if (and (not (setq calc-graph-xvec (eq (car-safe calc-graph-xvalue) 'vec)))
593 calc-graph-refine (cdr (cdr calc-graph-ycache)))
594 (calc-graph-refine-2d)
595 (calc-graph-recompute-2d))))
596
597 (defun calc-graph-refine-2d ()
598 (setq calc-graph-keep-file nil
599 calc-graph-ycacheptr (cdr calc-graph-ycache))
600 (if (and (setq calc-graph-xval (calc-graph-find-command "xrange"))
601 (string-match "\\`\\[\\([0-9.eE+-]*\\):\\([0-9.eE+-]*\\)\\]\\'"
602 calc-graph-xval))
603 (let ((b2 (match-beginning 2))
604 (e2 (match-end 2)))
605 (setq calc-graph-xlow (math-read-number (substring calc-graph-xval
606 (match-beginning 1)
607 (match-end 1)))
608 calc-graph-xhigh (math-read-number (substring calc-graph-xval b2 e2))))
609 (if calc-graph-xlow
610 (while (and (cdr calc-graph-ycacheptr)
611 (Math-lessp (car (nth 1 calc-graph-ycacheptr)) calc-graph-xlow))
612 (setq calc-graph-ycacheptr (cdr calc-graph-ycacheptr)))))
613 (setq math-working-step-2 (1- (length calc-graph-ycacheptr)))
614 (while (and (cdr calc-graph-ycacheptr)
615 (or (not calc-graph-xhigh)
616 (Math-lessp (car (car calc-graph-ycacheptr)) calc-graph-xhigh)))
617 (setq var-DUMMY (math-div (math-add (car (car calc-graph-ycacheptr))
618 (car (nth 1 calc-graph-ycacheptr)))
619 2)
620 math-working-step (1+ math-working-step)
621 calc-graph-yval (math-evaluate-expr calc-graph-yvalue))
622 (setcdr calc-graph-ycacheptr (cons (cons var-DUMMY calc-graph-yval)
623 (cdr calc-graph-ycacheptr)))
624 (setq calc-graph-ycacheptr (cdr (cdr calc-graph-ycacheptr))))
625 (setq calc-graph-yp calc-graph-ycache
626 calc-graph-numsteps 1000000))
627
628 (defun calc-graph-recompute-2d ()
629 (setq calc-graph-ycacheptr calc-graph-ycache)
630 (if calc-graph-xvec
631 (setq calc-graph-numsteps (1- (length calc-graph-xvalue))
632 calc-graph-yvector nil)
633 (if (and (eq (car-safe calc-graph-xvalue) 'intv)
634 (math-constp calc-graph-xvalue))
635 (setq calc-graph-numsteps calc-graph-resolution
636 calc-graph-yp nil
637 calc-graph-xlow (nth 2 calc-graph-xvalue)
638 calc-graph-xhigh (nth 3 calc-graph-xvalue)
639 calc-graph-xstep (math-div (math-sub calc-graph-xhigh calc-graph-xlow)
640 (1- calc-graph-numsteps))
641 calc-graph-xvalue (nth 2 calc-graph-xvalue))
642 (error "%s is not a suitable basis for %s"
643 calc-graph-xname calc-graph-yname)))
644 (setq math-working-step-2 calc-graph-numsteps)
645 (while (>= (setq calc-graph-numsteps (1- calc-graph-numsteps)) 0)
646 (setq math-working-step (1+ math-working-step))
647 (if calc-graph-xvec
648 (progn
649 (setq calc-graph-xp (cdr calc-graph-xp)
650 calc-graph-xval (car calc-graph-xp))
651 (and (not (eq calc-graph-ycacheptr calc-graph-ycache))
652 (consp (car calc-graph-ycacheptr))
653 (not (Math-lessp (car (car calc-graph-ycacheptr)) calc-graph-xval))
654 (setq calc-graph-ycacheptr calc-graph-ycache)))
655 (if (= calc-graph-numsteps 0)
656 (setq calc-graph-xval calc-graph-xhigh) ; avoid cumulative roundoff
657 (setq calc-graph-xval calc-graph-xvalue
658 calc-graph-xvalue (math-add calc-graph-xvalue calc-graph-xstep))))
659 (while (and (cdr calc-graph-ycacheptr)
660 (Math-lessp (car (nth 1 calc-graph-ycacheptr)) calc-graph-xval))
661 (setq calc-graph-ycacheptr (cdr calc-graph-ycacheptr)))
662 (or (and (cdr calc-graph-ycacheptr)
663 (Math-equal (car (nth 1 calc-graph-ycacheptr)) calc-graph-xval))
664 (progn
665 (setq calc-graph-keep-file nil
666 var-DUMMY calc-graph-xval)
667 (setcdr calc-graph-ycacheptr (cons (cons calc-graph-xval (math-evaluate-expr calc-graph-yvalue))
668 (cdr calc-graph-ycacheptr)))))
669 (setq calc-graph-ycacheptr (cdr calc-graph-ycacheptr))
670 (if calc-graph-xvec
671 (setq calc-graph-yvector (cons (cdr (car calc-graph-ycacheptr)) calc-graph-yvector))
672 (or calc-graph-yp (setq calc-graph-yp calc-graph-ycacheptr))))
673 (if calc-graph-xvec
674 (setq calc-graph-xp calc-graph-xvalue
675 calc-graph-yvec t
676 calc-graph-yp (cons 'vec (nreverse calc-graph-yvector))
677 calc-graph-numsteps (1- (length calc-graph-xp)))
678 (setq calc-graph-numsteps 1000000)))
679
680 (defun calc-graph-compute-3d ()
681 (if (setq calc-graph-yvec (eq (car-safe calc-graph-yvalue) 'vec))
682 (if (math-matrixp calc-graph-yvalue)
683 (progn
684 (setq calc-graph-numsteps (1- (length calc-graph-yvalue))
685 calc-graph-numsteps3 (1- (length (nth 1 calc-graph-yvalue))))
686 (if (eq (car-safe calc-graph-xvalue) 'vec)
687 (or (= (1- (length calc-graph-xvalue)) calc-graph-numsteps)
688 (error "%s has wrong length" calc-graph-xname))
689 (if (and (eq (car-safe calc-graph-xvalue) 'intv)
690 (math-constp calc-graph-xvalue))
691 (setq calc-graph-xvalue (calcFunc-index calc-graph-numsteps
692 (nth 2 calc-graph-xvalue)
693 (math-div
694 (math-sub (nth 3 calc-graph-xvalue)
695 (nth 2 calc-graph-xvalue))
696 (1- calc-graph-numsteps))))
697 (if (math-realp calc-graph-xvalue)
698 (setq calc-graph-xvalue (calcFunc-index calc-graph-numsteps calc-graph-xvalue 1))
699 (error "%s is not a suitable basis for %s" calc-graph-xname calc-graph-yname))))
700 (if (eq (car-safe calc-graph-y3value) 'vec)
701 (or (= (1- (length calc-graph-y3value)) calc-graph-numsteps3)
702 (error "%s has wrong length" calc-graph-y3name))
703 (if (and (eq (car-safe calc-graph-y3value) 'intv)
704 (math-constp calc-graph-y3value))
705 (setq calc-graph-y3value (calcFunc-index calc-graph-numsteps3
706 (nth 2 calc-graph-y3value)
707 (math-div
708 (math-sub (nth 3 calc-graph-y3value)
709 (nth 2 calc-graph-y3value))
710 (1- calc-graph-numsteps3))))
711 (if (math-realp calc-graph-y3value)
712 (setq calc-graph-y3value (calcFunc-index calc-graph-numsteps3 calc-graph-y3value 1))
713 (error "%s is not a suitable basis for %s" calc-graph-y3name calc-graph-yname))))
714 (setq calc-graph-xp nil
715 calc-graph-yp nil
716 calc-graph-zp nil
717 calc-graph-xvec t)
718 (while (setq calc-graph-xvalue (cdr calc-graph-xvalue) calc-graph-yvalue (cdr calc-graph-yvalue))
719 (setq calc-graph-xp (nconc calc-graph-xp (make-list (1+ calc-graph-numsteps3) (car calc-graph-xvalue)))
720 calc-graph-yp (nconc calc-graph-yp (cons 0 (copy-sequence (cdr calc-graph-y3value))))
721 calc-graph-zp (nconc calc-graph-zp (cons '(skip)
722 (copy-sequence (cdr (car calc-graph-yvalue)))))))
723 (setq calc-graph-numsteps (1- (* calc-graph-numsteps
724 (1+ calc-graph-numsteps3)))))
725 (if (= (setq calc-graph-numsteps (1- (length calc-graph-yvalue))) 0)
726 (error "Can't plot an empty vector"))
727 (or (and (eq (car-safe calc-graph-xvalue) 'vec)
728 (= (1- (length calc-graph-xvalue)) calc-graph-numsteps))
729 (error "%s is not a suitable basis for %s" calc-graph-xname calc-graph-yname))
730 (or (and (eq (car-safe calc-graph-y3value) 'vec)
731 (= (1- (length calc-graph-y3value)) calc-graph-numsteps))
732 (error "%s is not a suitable basis for %s" calc-graph-y3name calc-graph-yname))
733 (setq calc-graph-xp calc-graph-xvalue
734 calc-graph-yp calc-graph-y3value
735 calc-graph-zp calc-graph-yvalue
736 calc-graph-xvec t))
737 (or (math-realp calc-graph-yvalue)
738 (let ((math-arglist nil))
739 (setq calc-graph-yvalue (math-evaluate-expr calc-graph-yvalue))
740 (calc-default-formula-arglist calc-graph-yvalue)
741 (setq math-arglist (sort math-arglist 'string-lessp))
742 (or (cdr math-arglist)
743 (error "%s does not contain enough unassigned variables" calc-graph-yname))
744 (and (cdr (cdr math-arglist))
745 (error "%s contains too many variables: %s" calc-graph-yname math-arglist))
746 (setq calc-graph-yvalue (math-multi-subst calc-graph-yvalue
747 (mapcar 'math-build-var-name
748 math-arglist)
749 '((var DUMMY var-DUMMY)
750 (var DUMMY2 var-DUMMY2))))))
751 (if (setq calc-graph-xvec (eq (car-safe calc-graph-xvalue) 'vec))
752 (setq calc-graph-numsteps (1- (length calc-graph-xvalue)))
753 (if (and (eq (car-safe calc-graph-xvalue) 'intv)
754 (math-constp calc-graph-xvalue))
755 (setq calc-graph-numsteps calc-graph-resolution
756 calc-graph-xvalue (calcFunc-index calc-graph-numsteps
757 (nth 2 calc-graph-xvalue)
758 (math-div (math-sub (nth 3 calc-graph-xvalue)
759 (nth 2 calc-graph-xvalue))
760 (1- calc-graph-numsteps))))
761 (error "%s is not a suitable basis for %s"
762 calc-graph-xname calc-graph-yname)))
763 (if (eq (car-safe calc-graph-y3value) 'vec)
764 (setq calc-graph-numsteps3 (1- (length calc-graph-y3value)))
765 (if (and (eq (car-safe calc-graph-y3value) 'intv)
766 (math-constp calc-graph-y3value))
767 (setq calc-graph-numsteps3 calc-graph-resolution
768 calc-graph-y3value (calcFunc-index calc-graph-numsteps3
769 (nth 2 calc-graph-y3value)
770 (math-div (math-sub (nth 3 calc-graph-y3value)
771 (nth 2 calc-graph-y3value))
772 (1- calc-graph-numsteps3))))
773 (error "%s is not a suitable basis for %s"
774 calc-graph-y3name calc-graph-yname)))
775 (setq calc-graph-xp nil
776 calc-graph-yp nil
777 calc-graph-zp nil
778 calc-graph-xvec t)
779 (setq math-working-step 0)
780 (while (setq calc-graph-xvalue (cdr calc-graph-xvalue))
781 (setq calc-graph-xp (nconc calc-graph-xp (make-list (1+ calc-graph-numsteps3) (car calc-graph-xvalue)))
782 calc-graph-yp (nconc calc-graph-yp (cons 0 (copy-sequence (cdr calc-graph-y3value))))
783 calc-graph-zp (cons '(skip) calc-graph-zp)
784 calc-graph-y3step calc-graph-y3value
785 var-DUMMY (car calc-graph-xvalue)
786 math-working-step-2 0
787 math-working-step (1+ math-working-step))
788 (while (setq calc-graph-y3step (cdr calc-graph-y3step))
789 (setq math-working-step-2 (1+ math-working-step-2)
790 var-DUMMY2 (car calc-graph-y3step)
791 calc-graph-zp (cons (math-evaluate-expr calc-graph-yvalue) calc-graph-zp))))
792 (setq calc-graph-zp (nreverse calc-graph-zp)
793 calc-graph-numsteps (1- (* calc-graph-numsteps (1+ calc-graph-numsteps3))))))
794
795 (defun calc-graph-format-data ()
796 (if (math-contains-sdev-p calc-graph-yp)
797 (let ((yp calc-graph-yp))
798 (setq calc-graph-yp (cons 'vec (mapcar 'math-get-value (cdr yp))))
799 (setq calc-graph-zp (cons 'vec (mapcar 'math-get-sdev (cdr yp))))))
800 (while (<= (setq calc-graph-stepcount (1+ calc-graph-stepcount)) calc-graph-numsteps)
801 (if calc-graph-xvec
802 (setq calc-graph-xp (cdr calc-graph-xp)
803 calc-graph-xval (car calc-graph-xp)
804 calc-graph-yp (cdr calc-graph-yp)
805 calc-graph-yval (car calc-graph-yp)
806 calc-graph-zp (cdr calc-graph-zp)
807 calc-graph-zval (car calc-graph-zp))
808 (if calc-graph-yvec
809 (setq calc-graph-xval calc-graph-xvalue
810 calc-graph-xvalue (math-add calc-graph-xvalue calc-graph-xstep)
811 calc-graph-yp (cdr calc-graph-yp)
812 calc-graph-yval (car calc-graph-yp))
813 (setq calc-graph-xval (car (car calc-graph-yp))
814 calc-graph-yval (cdr (car calc-graph-yp))
815 calc-graph-yp (cdr calc-graph-yp))
816 (if (or (not calc-graph-yp)
817 (and calc-graph-xhigh (equal calc-graph-xval calc-graph-xhigh)))
818 (setq calc-graph-numsteps 0))))
819 (if calc-graph-is-splot
820 (if (and (eq (car-safe calc-graph-zval) 'calcFunc-xyz)
821 (= (length calc-graph-zval) 4))
822 (setq calc-graph-xval (nth 1 calc-graph-zval)
823 calc-graph-yval (nth 2 calc-graph-zval)
824 calc-graph-zval (nth 3 calc-graph-zval)))
825 (if (and (eq (car-safe calc-graph-yval) 'calcFunc-xyz)
826 (= (length calc-graph-yval) 4))
827 (progn
828 (or calc-graph-surprise-splot
829 (with-current-buffer (get-buffer-create "*Gnuplot Temp*")
830 (save-excursion
831 (goto-char (point-max))
832 (re-search-backward "^plot[ \t]")
833 (insert "set parametric\ns")
834 (setq calc-graph-surprise-splot t))))
835 (setq calc-graph-xval (nth 1 calc-graph-yval)
836 calc-graph-zval (nth 3 calc-graph-yval)
837 calc-graph-yval (nth 2 calc-graph-yval)))
838 (if (and (eq (car-safe calc-graph-yval) 'calcFunc-xy)
839 (= (length calc-graph-yval) 3))
840 (setq calc-graph-xval (nth 1 calc-graph-yval)
841 calc-graph-yval (nth 2 calc-graph-yval)))))
842 (if (and (Math-realp calc-graph-xval)
843 (Math-realp calc-graph-yval)
844 (or (not calc-graph-zval) (Math-realp calc-graph-zval)))
845 (progn
846 (setq calc-graph-blank nil
847 calc-graph-non-blank t)
848 (if (Math-integerp calc-graph-xval)
849 (insert (math-format-number calc-graph-xval))
850 (if (eq (car calc-graph-xval) 'frac)
851 (setq calc-graph-xval (math-float calc-graph-xval)))
852 (insert (math-format-number (nth 1 calc-graph-xval))
853 "e" (int-to-string (nth 2 calc-graph-xval))))
854 (insert " ")
855 (if (Math-integerp calc-graph-yval)
856 (insert (math-format-number calc-graph-yval))
857 (if (eq (car calc-graph-yval) 'frac)
858 (setq calc-graph-yval (math-float calc-graph-yval)))
859 (insert (math-format-number (nth 1 calc-graph-yval))
860 "e" (int-to-string (nth 2 calc-graph-yval))))
861 (if calc-graph-zval
862 (progn
863 (insert " ")
864 (if (Math-integerp calc-graph-zval)
865 (insert (math-format-number calc-graph-zval))
866 (if (eq (car calc-graph-zval) 'frac)
867 (setq calc-graph-zval (math-float calc-graph-zval)))
868 (insert (math-format-number (nth 1 calc-graph-zval))
869 "e" (int-to-string (nth 2 calc-graph-zval))))))
870 (insert "\n"))
871 (and (not (equal calc-graph-zval '(skip)))
872 (boundp 'var-PlotRejects)
873 (eq (car-safe var-PlotRejects) 'vec)
874 (nconc var-PlotRejects
875 (list (list 'vec
876 calc-graph-curve-num
877 calc-graph-stepcount
878 calc-graph-xval calc-graph-yval)))
879 (calc-refresh-evaltos 'var-PlotRejects))
880 (or calc-graph-blank
881 (progn
882 (insert "\n")
883 (setq calc-graph-blank t))))))
884
885 (defun calc-temp-file-name (num)
886 (while (<= (length calc-graph-file-cache) (1+ num))
887 (setq calc-graph-file-cache (nconc calc-graph-file-cache (list nil))))
888 (car (or (nth (1+ num) calc-graph-file-cache)
889 (setcar (nthcdr (1+ num) calc-graph-file-cache)
890 (list (make-temp-file
891 (concat calc-gnuplot-tempfile
892 (if (<= num 0)
893 (char-to-string (- ?A num))
894 (int-to-string num))))
895 nil)))))
896
897 (defun calc-graph-delete-temps ()
898 (while calc-graph-file-cache
899 (and (car calc-graph-file-cache)
900 (file-exists-p (car (car calc-graph-file-cache)))
901 (condition-case err
902 (delete-file (car (car calc-graph-file-cache)))
903 (error nil)))
904 (setq calc-graph-file-cache (cdr calc-graph-file-cache))))
905
906 (defun calc-graph-kill-hook ()
907 (calc-graph-delete-temps))
908
909 (defun calc-graph-show-tty (output)
910 "Default calc-gnuplot-plot-command for \"tty\" output mode.
911 This is useful for tek40xx and other graphics-terminal types."
912 (call-process-region 1 1 shell-file-name
913 nil calc-gnuplot-buffer nil
914 "-c" (format "cat %s >/dev/tty; rm %s" output output)))
915
916 (defvar calc-dumb-map nil
917 "The keymap for the \"dumb\" terminal plot.")
918
919 (defun calc-graph-show-dumb (&optional output)
920 "Default calc-gnuplot-plot-command for Pinard's \"dumb\" terminal type.
921 This \"dumb\" driver will be present in Gnuplot 3.0."
922 (interactive)
923 (save-window-excursion
924 (switch-to-buffer calc-gnuplot-buffer)
925 (delete-other-windows)
926 (goto-char calc-gnuplot-trail-mark)
927 (or (search-forward "\f" nil t)
928 (sleep-for 1))
929 (goto-char (point-max))
930 (re-search-backward "\f\\|^[ \t]+\\^$\\|G N U P L O T")
931 (if (looking-at "\f")
932 (progn
933 (forward-char 1)
934 (if (eolp) (forward-line 1))
935 (or (calc-graph-find-command "time")
936 (calc-graph-find-command "title")
937 (calc-graph-find-command "ylabel")
938 (let ((pt (point)))
939 (insert-before-markers (format "(%s)" (current-time-string)))
940 (goto-char pt)))
941 (set-window-start (selected-window) (point))
942 (goto-char (point-max)))
943 (end-of-line)
944 (backward-char 1)
945 (recenter '(4)))
946 (or calc-dumb-map
947 (progn
948 (setq calc-dumb-map (make-sparse-keymap))
949 (define-key calc-dumb-map "\n" 'scroll-up)
950 (define-key calc-dumb-map " " 'scroll-up)
951 (define-key calc-dumb-map "\177" 'scroll-down)
952 (define-key calc-dumb-map "<" 'scroll-left)
953 (define-key calc-dumb-map ">" 'scroll-right)
954 (define-key calc-dumb-map "{" 'scroll-down)
955 (define-key calc-dumb-map "}" 'scroll-up)
956 (define-key calc-dumb-map "q" 'exit-recursive-edit)
957 (define-key calc-dumb-map "\C-c\C-c" 'exit-recursive-edit)))
958 (use-local-map calc-dumb-map)
959 (setq truncate-lines t)
960 (message "Type `q' or `C-c C-c' to return to Calc")
961 (recursive-edit)
962 (bury-buffer "*Gnuplot Trail*")))
963
964 (defun calc-graph-clear ()
965 (interactive)
966 (if calc-graph-last-device
967 (if (or (equal calc-graph-last-device "x11")
968 (equal calc-graph-last-device "X11"))
969 (calc-gnuplot-command "set output"
970 (if (equal calc-graph-last-output "STDOUT")
971 ""
972 (prin1-to-string calc-graph-last-output)))
973 (calc-gnuplot-command "clear"))))
974
975 (defun calc-graph-title-x (title)
976 (interactive "sX axis title: ")
977 (calc-graph-set-command "xlabel" (if (not (equal title ""))
978 (prin1-to-string title))))
979
980 (defun calc-graph-title-y (title)
981 (interactive "sY axis title: ")
982 (calc-graph-set-command "ylabel" (if (not (equal title ""))
983 (prin1-to-string title))))
984
985 (defun calc-graph-title-z (title)
986 (interactive "sZ axis title: ")
987 (calc-graph-set-command "zlabel" (if (not (equal title ""))
988 (prin1-to-string title))))
989
990 (defun calc-graph-range-x (range)
991 (interactive "sX axis range: ")
992 (calc-graph-set-range "xrange" range))
993
994 (defun calc-graph-range-y (range)
995 (interactive "sY axis range: ")
996 (calc-graph-set-range "yrange" range))
997
998 (defun calc-graph-range-z (range)
999 (interactive "sZ axis range: ")
1000 (calc-graph-set-range "zrange" range))
1001
1002 (defun calc-graph-set-range (cmd range)
1003 (if (equal range "$")
1004 (calc-wrapper
1005 (let ((val (calc-top-n 1)))
1006 (if (and (eq (car-safe val) 'intv) (math-constp val))
1007 (setq range (concat
1008 (math-format-number (math-float (nth 2 val))) ":"
1009 (math-format-number (math-float (nth 3 val)))))
1010 (if (and (eq (car-safe val) 'vec)
1011 (= (length val) 3))
1012 (setq range (concat
1013 (math-format-number (math-float (nth 1 val))) ":"
1014 (math-format-number (math-float (nth 2 val)))))
1015 (error "Range specification must be an interval or 2-vector")))
1016 (calc-pop-stack 1))))
1017 (if (string-match "\\[.+\\]" range)
1018 (setq range (substring range 1 -1)))
1019 (if (and (not (string-match ":" range))
1020 (or (string-match "," range)
1021 (string-match " " range)))
1022 (aset range (match-beginning 0) ?\:))
1023 (calc-graph-set-command cmd (if (not (equal range ""))
1024 (concat "[" range "]"))))
1025
1026 (defun calc-graph-log-x (flag)
1027 (interactive "P")
1028 (calc-graph-set-log flag 0 0))
1029
1030 (defun calc-graph-log-y (flag)
1031 (interactive "P")
1032 (calc-graph-set-log 0 flag 0))
1033
1034 (defun calc-graph-log-z (flag)
1035 (interactive "P")
1036 (calc-graph-set-log 0 0 flag))
1037
1038 (defun calc-graph-set-log (xflag yflag zflag)
1039 (let* ((old (or (calc-graph-find-command "logscale") ""))
1040 (xold (string-match "x" old))
1041 (yold (string-match "y" old))
1042 (zold (string-match "z" old))
1043 str)
1044 (setq str (concat (if (if xflag
1045 (if (eq xflag 0) xold
1046 (> (prefix-numeric-value xflag) 0))
1047 (not xold)) "x" "")
1048 (if (if yflag
1049 (if (eq yflag 0) yold
1050 (> (prefix-numeric-value yflag) 0))
1051 (not yold)) "y" "")
1052 (if (if zflag
1053 (if (eq zflag 0) zold
1054 (> (prefix-numeric-value zflag) 0))
1055 (not zold)) "z" "")))
1056 (calc-graph-set-command "logscale" (if (not (equal str "")) str))))
1057
1058 (defun calc-graph-line-style (style)
1059 (interactive "P")
1060 (calc-graph-set-styles (and style (prefix-numeric-value style)) t))
1061
1062 (defun calc-graph-point-style (style)
1063 (interactive "P")
1064 (calc-graph-set-styles t (and style (prefix-numeric-value style))))
1065
1066 (defun calc-graph-set-styles (lines points &optional yerr)
1067 (calc-graph-init)
1068 (with-current-buffer calc-gnuplot-input
1069 (or (calc-graph-find-plot nil nil)
1070 (error "No data points have been set!"))
1071 (let ((base (point))
1072 (mode nil) (lstyle nil) (pstyle nil)
1073 start end lenbl penbl errform)
1074 (re-search-forward "[,\n]")
1075 (forward-char -1)
1076 (setq end (point) start end)
1077 (goto-char base)
1078 (if (looking-at "[^,\n]*[^,\n \t]\\([ \t]+with\\)")
1079 (progn
1080 (setq start (match-beginning 1))
1081 (goto-char (match-end 0))
1082 (if (looking-at "[ \t]+\\([a-z]+\\)")
1083 (setq mode (buffer-substring (match-beginning 1)
1084 (match-end 1))))
1085 (if (looking-at "[ \ta-z]+\\([0-9]+\\)")
1086 (setq lstyle (string-to-number
1087 (buffer-substring (match-beginning 1)
1088 (match-end 1)))))
1089 (if (looking-at "[ \ta-z]+[0-9]+[ \t]+\\([0-9]+\\)")
1090 (setq pstyle (string-to-number
1091 (buffer-substring (match-beginning 1)
1092 (match-end 1)))))))
1093 (unless yerr
1094 (setq lenbl (or (equal mode "lines")
1095 (equal mode "linespoints"))
1096 penbl (or (equal mode "points")
1097 (equal mode "linespoints")))
1098 (if lines
1099 (or (eq lines t)
1100 (setq lstyle lines
1101 lenbl (>= lines 0)))
1102 (setq lenbl (not lenbl)))
1103 (if points
1104 (or (eq points t)
1105 (setq pstyle points
1106 penbl (>= points 0)))
1107 (setq penbl (not penbl))))
1108 (delete-region start end)
1109 (goto-char start)
1110 (setq errform
1111 (condition-case nil
1112 (math-contains-sdev-p
1113 (eval (intern
1114 (concat "var-"
1115 (save-excursion
1116 (re-search-backward ":\\(.*\\)\\}")
1117 (match-string 1))))))
1118 (error nil)))
1119 (if yerr
1120 (insert " with yerrorbars")
1121 (insert " with "
1122 (if (and errform
1123 (equal mode "dots")
1124 (eq lines t))
1125 "yerrorbars"
1126 (if lenbl
1127 (if penbl "linespoints" "lines")
1128 (if penbl "points" "dots"))))
1129 (if (and pstyle (> pstyle 0))
1130 (insert " "
1131 (if (and lstyle (> lstyle 0)) (int-to-string lstyle) "1")
1132 " " (int-to-string pstyle))
1133 (if (and lstyle (> lstyle 0))
1134 (insert " " (int-to-string lstyle)))))))
1135 (calc-graph-view-commands))
1136
1137 (defun calc-graph-zero-x (flag)
1138 (interactive "P")
1139 (calc-graph-set-command "noxzeroaxis"
1140 (and (if flag
1141 (<= (prefix-numeric-value flag) 0)
1142 (not (calc-graph-find-command "noxzeroaxis")))
1143 " ")))
1144
1145 (defun calc-graph-zero-y (flag)
1146 (interactive "P")
1147 (calc-graph-set-command "noyzeroaxis"
1148 (and (if flag
1149 (<= (prefix-numeric-value flag) 0)
1150 (not (calc-graph-find-command "noyzeroaxis")))
1151 " ")))
1152
1153 (defun calc-graph-name (name)
1154 (interactive "sTitle for current curve: ")
1155 (calc-graph-init)
1156 (with-current-buffer calc-gnuplot-input
1157 (or (calc-graph-find-plot nil nil)
1158 (error "No data points have been set!"))
1159 (let ((base (point))
1160 start
1161 end)
1162 (re-search-forward "[,\n]\\|[ \t]+with")
1163 (setq end (match-beginning 0))
1164 (goto-char base)
1165 (if (looking-at "[^,\n]*[^,\n \t]\\([ \t]+title\\)")
1166 (progn
1167 (goto-char (match-beginning 1))
1168 (delete-region (point) end))
1169 (goto-char end))
1170 (insert " title " (prin1-to-string name))))
1171 (calc-graph-view-commands))
1172
1173 (defun calc-graph-hide (flag)
1174 (interactive "P")
1175 (calc-graph-init)
1176 (and (calc-graph-find-plot nil nil)
1177 (progn
1178 (or (looking-at "{")
1179 (error "Can't hide this curve (wrong format)"))
1180 (forward-char 1)
1181 (if (looking-at "*")
1182 (if (or (null flag) (<= (prefix-numeric-value flag) 0))
1183 (delete-char 1))
1184 (if (or (null flag) (> (prefix-numeric-value flag) 0))
1185 (insert "*"))))))
1186
1187 (defun calc-graph-header (title)
1188 (interactive "sTitle for entire graph: ")
1189 (calc-graph-set-command "title" (if (not (equal title ""))
1190 (prin1-to-string title))))
1191
1192 (defun calc-graph-border (flag)
1193 (interactive "P")
1194 (calc-graph-set-command "noborder"
1195 (and (if flag
1196 (<= (prefix-numeric-value flag) 0)
1197 (not (calc-graph-find-command "noborder")))
1198 " ")))
1199
1200 (defun calc-graph-grid (flag)
1201 (interactive "P")
1202 (calc-graph-set-command "grid" (and (if flag
1203 (> (prefix-numeric-value flag) 0)
1204 (not (calc-graph-find-command "grid")))
1205 " ")))
1206
1207 (defun calc-graph-key (flag)
1208 (interactive "P")
1209 (calc-graph-set-command "key" (and (if flag
1210 (> (prefix-numeric-value flag) 0)
1211 (not (calc-graph-find-command "key")))
1212 " ")))
1213
1214 (defun calc-graph-num-points (res flag)
1215 (interactive "sNumber of data points: \nP")
1216 (if flag
1217 (if (> (prefix-numeric-value flag) 0)
1218 (if (equal res "")
1219 (message "Default resolution is %d"
1220 calc-graph-default-resolution)
1221 (setq calc-graph-default-resolution (string-to-number res)))
1222 (if (equal res "")
1223 (message "Default 3D resolution is %d"
1224 calc-graph-default-resolution-3d)
1225 (setq calc-graph-default-resolution-3d (string-to-number res))))
1226 (calc-graph-set-command "samples" (if (not (equal res "")) res))))
1227
1228 (defun calc-graph-device (name flag)
1229 (interactive "sDevice name: \nP")
1230 (if (equal name "?")
1231 (progn
1232 (calc-gnuplot-command "set terminal")
1233 (calc-graph-view-trail))
1234 (if flag
1235 (if (> (prefix-numeric-value flag) 0)
1236 (if (equal name "")
1237 (message "Default GNUPLOT device is \"%s\""
1238 calc-gnuplot-default-device)
1239 (setq calc-gnuplot-default-device name))
1240 (if (equal name "")
1241 (message "GNUPLOT device for Print command is \"%s\""
1242 calc-gnuplot-print-device)
1243 (setq calc-gnuplot-print-device name)))
1244 (calc-graph-set-command "terminal" (if (not (equal name ""))
1245 name)))))
1246
1247 (defun calc-graph-output (name flag)
1248 (interactive "FOutput file name: \np")
1249 (cond ((string-match "\\<[aA][uU][tT][oO]$" name)
1250 (setq name "auto"))
1251 ((string-match "\\<[tT][tT][yY]$" name)
1252 (setq name "tty"))
1253 ((string-match "\\<[sS][tT][dD][oO][uU][tT]$" name)
1254 (setq name "STDOUT"))
1255 ((equal (file-name-nondirectory name) "")
1256 (setq name ""))
1257 (t (setq name (expand-file-name name))))
1258 (if flag
1259 (if (> (prefix-numeric-value flag) 0)
1260 (if (equal name "")
1261 (message "Default GNUPLOT output file is \"%s\""
1262 calc-gnuplot-default-output)
1263 (setq calc-gnuplot-default-output name))
1264 (if (equal name "")
1265 (message "GNUPLOT output file for Print command is \"%s\""
1266 calc-gnuplot-print-output)
1267 (setq calc-gnuplot-print-output name)))
1268 (calc-graph-set-command "output" (if (not (equal name ""))
1269 (prin1-to-string name)))))
1270
1271 (defun calc-graph-display (name)
1272 (interactive "sX display name: ")
1273 (if (equal name "")
1274 (message "Current X display is \"%s\""
1275 (or calc-gnuplot-display "<none>"))
1276 (setq calc-gnuplot-display name)
1277 (if (calc-gnuplot-alive)
1278 (calc-gnuplot-command "exit"))))
1279
1280 (defun calc-graph-geometry (name)
1281 (interactive "sX geometry spec (or \"default\"): ")
1282 (if (equal name "")
1283 (message "Current X geometry is \"%s\""
1284 (or calc-gnuplot-geometry "default"))
1285 (setq calc-gnuplot-geometry (and (not (equal name "default")) name))
1286 (if (calc-gnuplot-alive)
1287 (calc-gnuplot-command "exit"))))
1288
1289 (defun calc-graph-find-command (cmd)
1290 (calc-graph-init)
1291 (with-current-buffer calc-gnuplot-input
1292 (goto-char (point-min))
1293 (if (re-search-forward (concat "^set[ \t]+" cmd "[ \t]*\\(.*\\)$") nil t)
1294 (buffer-substring (match-beginning 1) (match-end 1)))))
1295
1296 (defun calc-graph-set-command (cmd &rest args)
1297 (calc-graph-init)
1298 (with-current-buffer calc-gnuplot-input
1299 (goto-char (point-min))
1300 (if (re-search-forward (concat "^set[ \t]+" cmd "[ \t\n]") nil t)
1301 (progn
1302 (forward-char -1)
1303 (end-of-line)
1304 (let ((end (point)))
1305 (beginning-of-line)
1306 (delete-region (point) (1+ end))))
1307 (if (calc-graph-find-plot t t)
1308 (if (eq (preceding-char) ?\n)
1309 (forward-char -1))
1310 (goto-char (1- (point-max)))))
1311 (if (and args (car args))
1312 (progn
1313 (or (bolp)
1314 (insert "\n"))
1315 (insert "set " (mapconcat 'identity (cons cmd args) " ") "\n"))))
1316 (calc-graph-view-commands))
1317
1318 (defun calc-graph-command (cmd)
1319 (interactive "sGNUPLOT command: ")
1320 (calc-wrapper
1321 (calc-graph-init)
1322 (calc-graph-view-trail)
1323 (calc-gnuplot-command cmd)
1324 (or (string= calc-gnuplot-name "pgnuplot")
1325 (progn
1326 (accept-process-output)
1327 (calc-graph-view-trail)))))
1328
1329 (defun calc-graph-kill (&optional no-view)
1330 (interactive)
1331 (calc-graph-delete-temps)
1332 (if (calc-gnuplot-alive)
1333 (calc-wrapper
1334 (or no-view (calc-graph-view-trail))
1335 (let ((calc-graph-no-wait t))
1336 (calc-gnuplot-command "exit"))
1337 (sit-for 1)
1338 (if (process-status calc-gnuplot-process)
1339 (delete-process calc-gnuplot-process))
1340 (setq calc-gnuplot-process nil))))
1341
1342 (defun calc-graph-quit ()
1343 (interactive)
1344 (if (get-buffer-window calc-gnuplot-input)
1345 (calc-graph-view-commands t))
1346 (if (get-buffer-window calc-gnuplot-buffer)
1347 (calc-graph-view-trail t))
1348 (calc-graph-kill t))
1349
1350 (defun calc-graph-view-commands (&optional no-need)
1351 (interactive "p")
1352 (or calc-graph-no-auto-view (calc-graph-init-buffers))
1353 (calc-graph-view calc-gnuplot-input calc-gnuplot-buffer (null no-need)))
1354
1355 (defun calc-graph-view-trail (&optional no-need)
1356 (interactive "p")
1357 (or calc-graph-no-auto-view (calc-graph-init-buffers))
1358 (calc-graph-view calc-gnuplot-buffer calc-gnuplot-input (null no-need)))
1359
1360 (defun calc-graph-view (buf other-buf need)
1361 (let (win)
1362 (or calc-graph-no-auto-view
1363 (if (setq win (get-buffer-window buf))
1364 (or need
1365 (and (eq buf calc-gnuplot-buffer)
1366 (with-current-buffer buf
1367 (not (pos-visible-in-window-p (point-max) win))))
1368 (progn
1369 (bury-buffer buf)
1370 (bury-buffer other-buf)
1371 (let ((curwin (selected-window)))
1372 (select-window win)
1373 (switch-to-buffer nil)
1374 (select-window curwin))))
1375 (if (setq win (get-buffer-window other-buf))
1376 (set-window-buffer win buf)
1377 (if (eq major-mode 'calc-mode)
1378 (if (or need
1379 (not (window-full-height-p)))
1380 (display-buffer buf))
1381 (switch-to-buffer buf)))))
1382 (with-current-buffer buf
1383 (if (and (eq buf calc-gnuplot-buffer)
1384 (setq win (get-buffer-window buf))
1385 (not (pos-visible-in-window-p (point-max) win)))
1386 (progn
1387 (goto-char (point-max))
1388 (vertical-motion (- 6 (window-height win)))
1389 (set-window-start win (point))
1390 (goto-char (point-max)))))
1391 (or calc-graph-no-auto-view (sit-for 0))))
1392
1393 (defun calc-gnuplot-check-for-errors ()
1394 (if (save-excursion
1395 (prog2
1396 (progn
1397 (set-buffer calc-gnuplot-buffer)
1398 (goto-char calc-gnuplot-last-error-pos))
1399 (re-search-forward "^[ \t]+\\^$" nil t)
1400 (goto-char (point-max))
1401 (setq calc-gnuplot-last-error-pos (point-max))))
1402 (calc-graph-view-trail)))
1403
1404 (defun calc-gnuplot-command (&rest args)
1405 (calc-graph-init)
1406 (let ((cmd (concat (mapconcat 'identity args " ") "\n")))
1407 (or (string= calc-gnuplot-name "pgnuplot")
1408 (accept-process-output))
1409 (with-current-buffer calc-gnuplot-buffer
1410 (calc-gnuplot-check-for-errors)
1411 (goto-char (point-max))
1412 (setq calc-gnuplot-trail-mark (point))
1413 (or (>= calc-gnuplot-version 3)
1414 (insert cmd))
1415 (set-marker (process-mark calc-gnuplot-process) (point))
1416 (process-send-string calc-gnuplot-process cmd)
1417 (if (get-buffer-window calc-gnuplot-buffer)
1418 (calc-graph-view-trail))
1419 (or (string= calc-gnuplot-name "pgnuplot")
1420 (accept-process-output (and (not calc-graph-no-wait)
1421 calc-gnuplot-process)))
1422 (calc-gnuplot-check-for-errors)
1423 (if (get-buffer-window calc-gnuplot-buffer)
1424 (calc-graph-view-trail)))))
1425
1426 (defun calc-graph-init-buffers ()
1427 (or (and calc-gnuplot-buffer
1428 (buffer-name calc-gnuplot-buffer))
1429 (setq calc-gnuplot-buffer (get-buffer-create "*Gnuplot Trail*")))
1430 (or (and calc-gnuplot-input
1431 (buffer-name calc-gnuplot-input))
1432 (setq calc-gnuplot-input (get-buffer-create "*Gnuplot Commands*"))))
1433
1434 (defun calc-graph-init ()
1435 (or (calc-gnuplot-alive)
1436 (let ((process-connection-type t)
1437 origin)
1438 (if calc-gnuplot-process
1439 (progn
1440 (delete-process calc-gnuplot-process)
1441 (setq calc-gnuplot-process nil)))
1442 (calc-graph-init-buffers)
1443 (with-current-buffer calc-gnuplot-buffer
1444 (insert "\nStarting gnuplot...\n")
1445 (setq origin (point)))
1446 (setq calc-graph-last-device nil)
1447 (setq calc-graph-last-output nil)
1448 (if (string= calc-gnuplot-name "pgnuplot")
1449 (let ((version-str (shell-command-to-string "pgnuplot -V")))
1450 (if (string-match "gnuplot \\([0-9]+\\)\\." version-str)
1451 (setq calc-gnuplot-version (string-to-number
1452 (substring version-str
1453 (match-beginning 1)
1454 (match-end 1))))
1455 (setq calc-gnuplot-version 1))))
1456 (condition-case err
1457 (let ((args (append (and calc-gnuplot-display
1458 (not (equal calc-gnuplot-display
1459 (getenv "DISPLAY")))
1460 (not (string= calc-gnuplot-name "pgnuplot"))
1461 (list "-display"
1462 calc-gnuplot-display))
1463 (and calc-gnuplot-geometry
1464 (not (string= calc-gnuplot-name "pgnuplot"))
1465 (list "-geometry"
1466 calc-gnuplot-geometry)))))
1467 (setq calc-gnuplot-process
1468 (apply 'start-process
1469 "gnuplot"
1470 calc-gnuplot-buffer
1471 calc-gnuplot-name
1472 args))
1473 (set-process-query-on-exit-flag calc-gnuplot-process nil))
1474 (file-error
1475 (error "Sorry, can't find \"%s\" on your system"
1476 calc-gnuplot-name)))
1477 (with-current-buffer calc-gnuplot-buffer
1478 (while (and (not (string= calc-gnuplot-name "pgnuplot"))
1479 (not (save-excursion
1480 (goto-char origin)
1481 (search-forward "gnuplot> " nil t)))
1482 (memq (process-status calc-gnuplot-process) '(run stop)))
1483 (accept-process-output calc-gnuplot-process))
1484 (or (memq (process-status calc-gnuplot-process) '(run stop))
1485 (error "Unable to start GNUPLOT process"))
1486 (if (not (string= calc-gnuplot-name "pgnuplot"))
1487 (if (save-excursion
1488 (goto-char origin)
1489 (re-search-forward
1490 "G N U P L O T.*\n.*version \\([0-9]+\\)\\." nil t))
1491 (setq calc-gnuplot-version
1492 (string-to-number (buffer-substring
1493 (match-beginning 1)
1494 (match-end 1))))
1495 (setq calc-gnuplot-version 1)))
1496 (goto-char (point-max)))))
1497 (with-current-buffer calc-gnuplot-input
1498 (if (= (buffer-size) 0)
1499 (insert "# Commands for running gnuplot\n\n\n")
1500 (or calc-graph-no-auto-view
1501 (eq (char-after (1- (point-max))) ?\n)
1502 (progn
1503 (goto-char (point-max))
1504 (insert "\n"))))))
1505
1506 (provide 'calc-graph)
1507
1508 ;;; calc-graph.el ends here
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