const union value *val; /* Value of the variable v which this varinfo
refers to. This member is relevant only to
categorical variables. */
+ double mean; /* Mean for this variable */
+ double sd; /* Standard deviation for this variable */
};
void
coefficient structures for the model.
*/
void
-pspp_coeff_init (struct pspp_coeff ** c, const struct design_matrix *X)
+pspp_coeff_init (struct pspp_coeff ** coeff, const struct design_matrix *X)
{
size_t i;
int n_vals = 1;
- assert (c != NULL);
+ assert (coeff != NULL);
for (i = 0; i < X->m->size2; i++)
{
- c[i] = xmalloc (sizeof (*c[i]));
- c[i]->n_vars = n_vals; /* Currently, no procedures allow
- interactions. This line will have to
- change when procedures that allow
- interaction terms are written.
- */
- c[i]->v_info = xnmalloc (c[i]->n_vars, sizeof (*c[i]->v_info));
- assert (c[i]->v_info != NULL);
- c[i]->v_info->v = design_matrix_col_to_var (X, i);
-
- if (var_is_alpha (c[i]->v_info->v))
+ coeff[i] = xmalloc (sizeof (*coeff[i]));
+ coeff[i]->n_vars = n_vals; /* Currently, no procedures allow
+ interactions. This line will have to
+ change when procedures that allow
+ interaction terms are written.
+ */
+ coeff[i]->v_info = xnmalloc (coeff[i]->n_vars, sizeof (*coeff[i]->v_info));
+ assert (coeff[i]->v_info != NULL);
+ coeff[i]->v_info->v = design_matrix_col_to_var (X, i);
+
+ if (var_is_alpha (coeff[i]->v_info->v))
{
size_t k;
- k = design_matrix_var_to_column (X, c[i]->v_info->v);
+ k = design_matrix_var_to_column (X, coeff[i]->v_info->v);
assert (k <= i);
k = i - k;
- c[i]->v_info->val =
- cat_subscript_to_value (k, c[i]->v_info->v);
+ coeff[i]->v_info->val =
+ cat_subscript_to_value (k, coeff[i]->v_info->v);
}
+ coeff[i]->v_info->mean = 0.0;
+ coeff[i]->v_info->sd = 0.0;
}
}
void
-pspp_coeff_set_estimate (struct pspp_coeff *c, double estimate)
+pspp_coeff_set_estimate (struct pspp_coeff *coef, double estimate)
{
- c->estimate = estimate;
+ coef->estimate = estimate;
}
void
-pspp_coeff_set_std_err (struct pspp_coeff *c, double std_err)
+pspp_coeff_set_std_err (struct pspp_coeff *coef, double std_err)
{
- c->std_err = std_err;
+ coef->std_err = std_err;
}
/*
Return the estimated value of the coefficient.
*/
double
-pspp_coeff_get_est (const struct pspp_coeff *c)
+pspp_coeff_get_est (const struct pspp_coeff *coef)
{
- if (c == NULL)
+ if (coef == NULL)
{
return 0.0;
}
- return c->estimate;
+ return coef->estimate;
}
/*
Return the standard error of the estimated coefficient.
*/
double
-pspp_coeff_get_std_err (const struct pspp_coeff *c)
+pspp_coeff_get_std_err (const struct pspp_coeff *coef)
{
- if (c == NULL)
+ if (coef == NULL)
{
return 0.0;
}
- return c->std_err;
+ return coef->std_err;
}
/*
How many variables are associated with this coefficient?
*/
int
-pspp_coeff_get_n_vars (struct pspp_coeff *c)
+pspp_coeff_get_n_vars (struct pspp_coeff *coef)
{
- if (c == NULL)
+ if (coef == NULL)
{
return 0;
}
- return c->n_vars;
+ return coef->n_vars;
}
/*
0 unless the coefficient refers to an interaction term.
*/
const struct variable *
-pspp_coeff_get_var (struct pspp_coeff *c, int i)
+pspp_coeff_get_var (struct pspp_coeff *coef, int i)
{
- if (c == NULL)
+ if (coef == NULL)
{
return NULL;
}
- assert (i < c->n_vars);
- return (c->v_info + i)->v;
+ assert (i < coef->n_vars);
+ return (coef->v_info + i)->v;
+}
+
+/*
+ Which coefficient does this variable match? If the variable is
+ categorical, and has more than one coefficient, use the VAL to find
+ its coefficient.
+ */
+const struct pspp_coeff *
+pspp_coeff_var_to_coeff (const struct variable *v, struct pspp_coeff **coefs,
+ size_t n_coef, const union value *val)
+{
+ size_t i = 0;
+ size_t j = 0;
+ size_t v_idx;
+ struct pspp_coeff *result = NULL;
+
+ if (v != NULL)
+ {
+ v_idx = var_get_dict_index (v);
+ while (i < n_coef && var_get_dict_index (coefs[i]->v_info->v) != v_idx)
+ {
+ i++;
+ }
+ result = coefs[i];
+ if (var_is_alpha (v))
+ {
+ /*
+ Use the VAL to find the coefficient.
+ */
+ if (val != NULL)
+ {
+ j = i;
+ while (j < n_coef && compare_values (pspp_coeff_get_value (coefs[j], v),
+ val, var_get_width (v)) != 0)
+ {
+ j++;
+ }
+ result = ((j < n_coef) ? coefs[j] : NULL);
+ }
+ }
+ }
+ return result;
}
/*
Which value is associated with this coefficient/variable combination?
*/
const union value *
-pspp_coeff_get_value (struct pspp_coeff *c,
+pspp_coeff_get_value (struct pspp_coeff *coef,
const struct variable *v)
{
int i = 0;
const struct variable *candidate;
- if (c == NULL || v == NULL)
+ if (coef == NULL || v == NULL)
{
return NULL;
}
{
return NULL;
}
- while (i < c->n_vars)
+ while (i < coef->n_vars)
{
- candidate = pspp_coeff_get_var (c, i);
+ candidate = pspp_coeff_get_var (coef, i);
if (v == candidate)
{
- return (c->v_info + i)->val;
+ return (coef->v_info + i)->val;
}
i++;
}
return NULL;
}
+/*
+ Get or set the standard deviation of the variable associated with this coefficient.
+ */
+double pspp_coeff_get_sd (const struct pspp_coeff *coef)
+{
+ return coef->v_info->sd;
+}
+void pspp_coeff_set_sd (struct pspp_coeff *coef, double s)
+{
+ coef->v_info->sd = s;
+}
+
+/*
+ Get or set the mean for the variable associated with this coefficient.
+*/
+double pspp_coeff_get_mean (const struct pspp_coeff *coef)
+{
+ return coef->v_info->mean;
+}
+
+void pspp_coeff_set_mean (struct pspp_coeff *coef, double m)
+{
+ coef->v_info->mean = m;
+}
+
projects / pspp-builds.git / blobdiff