+ struct variable **vars = NULL;
+ struct variable **model_vars = NULL;
+
+ assert (t!= NULL);
+ model = t->c;
+ assert (model != NULL);
+ assert (model->depvar != NULL);
+ assert (model->resid != NULL);
+
+ dict_get_vars (default_dict, &vars, &n_vars, 1u << DC_SYSTEM);
+ vals = xnmalloc (n_vars, sizeof (*vals));
+ model_vars = xnmalloc (n_vars, sizeof (*model_vars));
+ assert (vals != NULL);
+ output = case_data_rw (c, model->resid->fv);
+ assert (output != NULL);
+
+ for (i = 0; i < n_vars; i++)
+ {
+ /* Use neither the predicted values nor the dependent variable. */
+ if (vars[i]->index != model->resid->index &&
+ vars[i]->index != model->depvar->index)
+ {
+ if (vars[i]->type == ALPHA && vars[i]->obs_vals != NULL)
+ {
+ tmp = vars[i]->obs_vals->vals;
+ }
+ else
+ {
+ tmp = NULL;
+ }
+ /*
+ Make sure the variable we use is in the linear model.
+ */
+ if (pspp_linreg_get_coeff (model, vars[i], tmp) != NULL)
+ {
+ vals[n_vals] = case_data (c, i);
+ model_vars[n_vals] = vars[i];
+ n_vals++;
+ }
+ }
+ if (vars[i]->index == model->depvar->index)
+ {
+ obs = case_data (c, i);
+ assert (obs != NULL);
+ }
+ }
+ output->f = (*model->residual) ((const struct variable **) vars,
+ vals, obs, model, n_vals);
+ free (vals);
+ free (model_vars);
+ return TRNS_CONTINUE;
+}
+/*
+ Returns 0 if NAME is a duplicate of any existing variable name.
+*/
+static int
+try_name (char *name)
+{
+ if (dict_lookup_var (default_dict, name) != NULL)
+ return 0;
+
+ return 1;
+}
+static
+void reg_get_name (char name[LONG_NAME_LEN], const char prefix[LONG_NAME_LEN])
+{
+ int i = 1;
+
+ snprintf (name, LONG_NAME_LEN, "%s%d", prefix, i);
+ while (!try_name(name))
+ {
+ i++;
+ snprintf (name, LONG_NAME_LEN, "%s%d", prefix, i);
+ }
+}
+static void
+reg_save_var (const char *prefix, trns_proc_func *f,
+ pspp_linreg_cache *c, struct variable **v,
+ int n_trns)
+{
+ static int trns_index = 1;
+ char name[LONG_NAME_LEN + 1];
+ struct variable *new_var;
+ struct reg_trns *t = NULL;
+
+ t = xmalloc (sizeof (*t));
+ assert (t != NULL);
+ t->trns_id = trns_index;
+ t->n_trns = n_trns;
+ t->c = c;
+ reg_get_name (name, prefix);
+ new_var = dict_create_var (default_dict, name, 0);
+ assert (new_var != NULL);
+ *v = new_var;
+ add_transformation (f, regression_trns_free, t);
+ trns_index++;
+}
+static void
+subcommand_save (int save, pspp_linreg_cache **models)
+{
+ pspp_linreg_cache **lc;
+ int n_trns = 0;
+ int i;