+ ds_put_c_format (&dss,
+ "COMPUTE %s = RV.UNIFORM (0,1) < %.*g.\n",
+ filter,
+ DBL_DIG + 1, percentage / 100.0 );
+ }
+ else
+ {
+ const gint n_cases =
+ gtk_spin_button_get_value (GTK_SPIN_BUTTON (scd->spinbutton1));
+ const gint from_n_cases =
+ gtk_spin_button_get_value (GTK_SPIN_BUTTON (scd->spinbutton2));
+
+
+ const gchar ranvar[]="rv_$";
+
+ ds_put_c_format (&dss,
+ "COMPUTE %s = $CASENUM.\n", key);
+
+ ds_put_c_format (&dss,
+ "COMPUTE %s = %s > %d.\n",
+ filter, key, from_n_cases);
+
+ ds_put_c_format (&dss,
+ "COMPUTE %s = RV.UNIFORM (0, 1).\n",
+ ranvar);
+
+ ds_put_c_format (&dss,
+ "SORT BY %s, %s.\n",
+ filter, ranvar);
+
+ ds_put_cstr (&dss, "EXECUTE.\n");
+
+
+ ds_put_c_format (&dss,
+ "COMPUTE %s = $CASENUM.\n",
+ filter );
+
+ ds_put_c_format (&dss,
+ "COMPUTE %s = %s <= %d\n",
+ filter,
+ filter,
+ n_cases );
+
+ ds_put_cstr (&dss, "EXECUTE.\n");
+
+
+ ds_put_c_format (&dss,
+ "SORT BY %s.\n",
+ key);
+
+ ds_put_c_format (&dss,
+ "DELETE VARIABLES %s, %s.\n",
+ key, ranvar);
+ }
+
+ ds_put_cstr (&dss, "EXECUTE.\n");
+ }
+ else
+ {
+ filter = gtk_entry_get_text (GTK_ENTRY (scd->entry));