include/gmx_matrix.h

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  35
  36 #ifndef _gmx_matrix_h
  37 #define _gmx_matrix_h
  38
  39 #include <stdio.h>
  40
  41 double **alloc_matrix(int n,int m);
  42
  43 void free_matrix(double **a,int n);
  44
  45 void matrix_multiply(FILE *fp,int n,int m,double **x,double **y,double **z);
  46
  47 /* Return 0 if OK or row number where inversion failed otherwise. */
  48 int matrix_invert(FILE *fp,int n,double **a);
  49
  50 double multi_regression(FILE *fp,int ny,double *y,
  51                                int nx,double **xx,double *a0);
  52 /* Perform a regression analysis to fit
  53  * y' = a0[0] xx[0] + a0[1] xx[1] ... + a0[nx-1] xx[nx-1]
  54  * with ny data points in each vector.
  55  * The coefficients are returned in vector a0.
  56  * The return value of the function is the chi2 value:
  57  * sum_{j=0}^{ny-1} (y[j] - y'[j])^2
  58  * If fp is not NULL debug information will be written to it.
  59  */
  60
  61 #endif