src/data/dataframe-array.lisp

   1 ;;; -*- mode: lisp -*-
   2
   3 ;;; Time-stamp: <2009-09-19 23:13:00 tony>
   4 ;;; Creation:   <2009-03-12 17:14:56 tony>
   5 ;;; File:       dataframe-array.lisp
   6 ;;; Author:     AJ Rossini <blindglobe@gmail.com>
   7 ;;; Copyright:  (c)2009--, AJ Rossini. BSD, LLGPL, or GPLv2, depending
   8 ;;;             on how it arrives.
   9 ;;; Purpose:    real dataframe class using lisp-arrays as storage.
  10
  11 ;;; What is this talk of 'release'? Klingons do not make software
  12 ;;; 'releases'.  Our software 'escapes', leaving a bloody trail of
  13 ;;; designers and quality assurance people in its wake.
  14
  15 ;;; This organization and structure is new to the 21st Century
  16 ;;; version..   Think, "21st Century Schizoid Man".
  17
  18
  19 ;;;;; DATAFRAME-ARRAY
  20
  21 (defclass dataframe-array (dataframe-like)
  22   ((store :initform nil
  23           :initarg :storage
  24           :type (array * *)
  25           :accessor dataset
  26           :documentation "Data storage: typed as array."))
  27   (:documentation "example implementation of dataframe-like using storage
  28   based on lisp arrays.  An obvious alternative could be a
  29   dataframe-matrix-like which uses the lisp-matrix classes."))
  30
  31 (defmethod nrows ((df dataframe-array))
  32   "specializes on inheritance from matrix-like in lisp-matrix."
  33   (array-dimension (dataset df) 0))
  34
  35 (defmethod ncols ((df dataframe-array))
  36   "specializes on inheritance from matrix-like in lisp-matrix."
  37   (array-dimension (dataset df) 1))
  38
  39 (defmethod xref ((df dataframe-array) &rest subscripts)
  40   "Returns a scalar in array, in the same vein as aref, mref, vref, etc.
  41 idx1/2 is row/col or case/var."
  42   (assert (>= 2 (length subscripts)))
  43 #| ;; needed?
  44   (assert (typep (elt subscripts 0) integer))
  45   (assert (typep (elt subscripts 1) integer))
  46 |#
  47   (aref (dataset df) (elt subscripts 0) (elt subscripts 1)))
  48
  49 (defmethod (setf xref) (value (df dataframe-array) &rest subscripts)
  50   "set value for df-ar."
  51   ;; (check-type val (elt (var-type df) index2))
  52   (setf (aref (dataset df) (elt subscripts 0) (elt subscripts 1)) value))
  53
  54 (defparameter *default-dataframe-class* 'dataframe-array)
  55
  56 (defmethod dfselect ((df dataframe-array)
  57                      &optional cases vars indices)
  58   "Extract the OR of cases, vars, or have a list of indices to extract"
  59   (if indices (error "Indicies not used yet"))
  60   (let ((newdf (make-instance *default-dataframe-class*
  61                 :storage (make-array (list  (length cases) (length vars)))
  62                 :nrows (length cases)
  63                 :ncols (length vars)
  64 #|
  65                 :case-labels (select-list caselist (case-labels df))
  66                 :var-labels (select-list varlist (var-labels df))
  67                 :var-types (select-list varlist (vartypes df))
  68 |#
  69                 )))
  70     (dotimes (i (length cases))
  71       (dotimes (j (length vars))
  72         (setf (xref newdf i j)
  73               (xref df
  74                     (position (elt cases i) (case-labels df))
  75                     (position (elt vars j) (var-labels df))))))))