N_1, N_2, ..., N_K categories, then the interaction will have
N_1 * N_2 * N_3 *...* N_K - 1 entries.
*/
+
+#include <config.h>
#include <assert.h>
-#include <libpspp/alloc.h>
#include <gsl/gsl_math.h>
#include <gsl/gsl_vector.h>
#include <data/category.h>
#include <data/variable.h>
#include "interaction.h"
+#include "xalloc.h"
+
/*
Convert a list of values to a binary vector. The order of VALS must
correspond to the order of V.