static bool run_factor (struct dataset *ds, const struct cmd_factor *factor);
-static void do_factor_by_matrix (const struct cmd_factor *factor, struct idata *idata);
+static bool do_factor_by_matrix (const struct cmd_factor *factor, struct idata *idata);
/* Return the communality of variable N, calculated to N_FACTORS */
static double
-communality (struct idata *idata, int n, int n_factors)
+communality (const struct idata *idata, int n, int n_factors)
{
return the_communality (idata->evec, idata->eval, n, n_factors);
}
static void
-show_scree (const struct cmd_factor *f, struct idata *idata)
+show_scree (const struct cmd_factor *f, const struct idata *idata)
{
struct scree *s;
const char *label ;
static void
-show_factor_matrix (const struct cmd_factor *factor, struct idata *idata, const char *title, const gsl_matrix *fm)
+show_factor_matrix (const struct cmd_factor *factor, const struct idata *idata, const char *title, const gsl_matrix *fm)
{
int i;
static void
-show_explained_variance (const struct cmd_factor * factor, struct idata *idata,
+show_explained_variance (const struct cmd_factor * factor,
+ const struct idata *idata,
const gsl_vector *initial_eigenvalues,
const gsl_vector *extracted_eigenvalues,
const gsl_vector *rotated_loadings)
casereader_destroy (r);
}
-static void
+static bool
do_factor_by_matrix (const struct cmd_factor *factor, struct idata *idata)
{
+ if (!idata->mm.cov && !idata->mm.corr)
+ {
+ msg (ME, _("The dataset has no complete covariance or correlation matrix."));
+ return false;
+ }
+
if (idata->mm.cov && !idata->mm.corr)
idata->mm.corr = correlation_from_covariance (idata->mm.cov, idata->mm.var_matrix);
if (idata->mm.corr && !idata->mm.cov)