/* PSPP - a program for statistical analysis.
- Copyright (C) 2005 Free Software Foundation, Inc. Written by Jason H. Stover.
+ Copyright (C) 2005, 2011 Free Software Foundation, Inc. Written by Jason H. Stover.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#ifndef LINREG_H
#define LINREG_H
-#include <stdbool.h>
+
#include <gsl/gsl_math.h>
-#include <gsl/gsl_vector.h>
#include <gsl/gsl_matrix.h>
+#include <gsl/gsl_vector.h>
+#include <stdbool.h>
enum
{
dfe, but since it is the best unbiased
estimate of the population variance, it
has its own entry here. */
- gsl_vector *ssx; /* Centered sums of squares for independent
- variables, i.e. \sum (x[i] - mean(x))^2. */
- double ssy; /* Centered sums of squares for dependent
- variable.
- */
/*
Covariance matrix of the parameter estimates.
*/
double dfe;
double dfm;
- /*
- 'Hat' or Hessian matrix, i.e. (X'X)^{-1}, where X is our
- design matrix.
- */
- gsl_matrix *hat;
-
struct variable *pred;
struct variable *resid;
+ int dependent_column; /* Column containing the dependent variable. Defaults to last column. */
};
typedef struct linreg_struct linreg;
double linreg_coeff (const linreg *, size_t);
const struct variable * linreg_indep_var (const linreg *, size_t);
size_t linreg_n_coeffs (const linreg *);
-size_t linreg_n_obs (const linreg *);
+double linreg_n_obs (const linreg *);
double linreg_sse (const linreg *);
double linreg_ssreg (const linreg *);
double linreg_dfmodel (const linreg *);
double linreg_sst (const linreg *);
+void linreg_set_depvar_mean (linreg *, double);
+double linreg_get_depvar_mean (linreg *);
#endif