#include <gsl/gsl_matrix.h>
struct variable;
-struct pspp_linreg_coeff;
+struct pspp_coeff;
union value;
enum
int n_coeffs;
/*
- The variable struct is ignored during estimation. It is here so
- the calling procedure can find the variable used in the model.
+ The variable struct is ignored during estimation. It is here so
+ the calling procedure can find the variable used in the model.
*/
const struct variable *depvar;
gsl_vector *residuals;
- struct pspp_linreg_coeff *coeff;
+ struct pspp_coeff **coeff;
int method; /* Method to use to estimate parameters. */
/*
Means and standard deviations of the variables.
variables, i.e. \sum (x[i] - mean(x))^2. */
double ssy; /* Centered sums of squares for dependent
variable.
- */
+ */
/*
Covariance matrix of the parameter estimates.
*/
const void *, int);
double (*residual) (const struct variable **,
const union value **,
- const union value *,
- const void *, int);
+ const union value *, const void *, int);
+ /*
+ Returns pointers to the variables used in the model.
+ */
+ int (*get_vars) (const void *, const struct variable **);
struct variable *resid;
+ struct variable *pred;
+
};
typedef struct pspp_linreg_cache_struct pspp_linreg_cache;
double
pspp_linreg_residual (const struct variable **, const union value **,
const union value *, const void *, int);
+/*
+ All variables used in the model.
+ */
+int pspp_linreg_get_vars (const void *, const struct variable **);
#endif