#include "gl/xalloc.h"
+#define EFFECTS_CODING 1
+
struct value_node
{
struct hmap_node node; /* Node in hash map. */
union value val; /* The value */
+ int index; /* A zero based unique index for this value */
};
struct interaction_value
{
- struct hmap_node node; /* Node in hash map. */
+ struct hmap_node node; /* Node in hash map */
- struct ccase *ccase; /* A case (probably the first in the dataset) which matches this value */
+ struct ccase *ccase; /* A case (probably the first in the dataset) which matches this value */
- /* Total of the weights of cases matching this interaction */
- double cc;
+ double cc; /* Total of the weights of cases matching this interaction */
void *user_data; /* A pointer to data which the caller can store stuff */
};
const struct variable *var; /* The variable */
struct hmap valmap; /* A map of value nodes */
+ int n_vals; /* Number of values for this variable */
};
+#if 0
static void
dump_interaction (const struct interaction *iact)
{
printf ("Interaction: %s\n", ds_cstr (&str));
ds_destroy (&str);
}
+#endif
static struct variable_node *
/* The number of distinct values of this interaction */
int n_cats;
- /* The degrees of freedom for this interaction */
- int df;
+ /* An array of integers df_n * df_{n-1} * df_{n-2} ...
+ These are the products of the degrees of freedom for the current
+ variable and all preceeding variables */
+ int *df_prod;
+
+ double *enc_sum;
/* A map of interaction_values indexed by subscript */
struct interaction_value **reverse_interaction_value_map;
void *aux2;
};
-
+#if 0
static void
categoricals_dump (const struct categoricals *cat)
{
printf (")\n");
}
}
-
+#endif
void
categoricals_destroy (struct categoricals *cat)
{
case_unref (iv->ccase);
}
+
+ free (cat->iap[i].enc_sum);
+ free (cat->iap[i].df_prod);
hmap_destroy (&cat->iap[i].ivmap);
}
lookup_case (const struct hmap *map, const struct interaction *iact, const struct ccase *c)
{
struct interaction_value *iv = NULL;
- size_t hash = interaction_case_hash (iact, c);
+ size_t hash = interaction_case_hash (iact, c, 0);
HMAP_FOR_EACH_WITH_HASH (iv, struct interaction_value, node, hash, map)
{
{
vn = pool_malloc (cat->pool, sizeof *vn);
vn->var = var;
+ vn->n_vals = 0;
hmap_init (&vn->valmap);
hmap_insert (&cat->varmap, &vn->node, hash);
if (valn == NULL)
{
valn = pool_malloc (cat->pool, sizeof *valn);
+ valn->index = vn->n_vals++;
value_init (&valn->val, width);
value_copy (&valn->val, val, width);
hmap_insert (&vn->valmap, &valn->node, hash);
}
}
-
for (i = 0 ; i < cat->n_iap; ++i)
{
const struct interaction *iact = cat->iap[i].iact;
// if ( interaction_case_is_missing (iact, c, cat->exclude))
// continue;
- size_t hash = interaction_case_hash (iact, c);
+ size_t hash = interaction_case_hash (iact, c, 0);
struct interaction_value *node = lookup_case (&cat->iap[i].ivmap, iact, c);
if ( NULL == node)
size_t
categoricals_df (const struct categoricals *cat, size_t n)
{
- return cat->iap[n].df;
+ const struct interact_params *iap = &cat->iap[n];
+ return iap->df_prod[iap->iact->n_vars - 1];
}
/* Calculate the degrees of freedom, and the number of categories */
for (i = 0 ; i < cat->n_iap; ++i)
{
+ int df = 1;
const struct interaction *iact = cat->iap[i].iact;
- cat->iap[i].df = 1;
- cat->iap[i].n_cats = 1;
+ cat->iap[i].df_prod = xcalloc (iact->n_vars, sizeof (int));
+ cat->iap[i].n_cats = 1;
+
for (v = 0 ; v < iact->n_vars; ++v)
{
const struct variable *var = iact->vars[v];
struct variable_node *vn = lookup_variable (&cat->varmap, var, hash_pointer (var, 0));
- cat->iap[i].df *= hmap_count (&vn->valmap) - 1;
+ cat->iap[i].df_prod[v] = df * (hmap_count (&vn->valmap) - 1);
+ df = cat->iap[i].df_prod[v];
+
cat->iap[i].n_cats *= hmap_count (&vn->valmap);
}
- cat->df_sum += cat->iap[i].df;
+ cat->df_sum += cat->iap[i].df_prod [v - 1];
cat->n_cats_total += cat->iap[i].n_cats;
}
iap->reverse_interaction_value_map[ii] = NULL;
/* Populate the reverse variable maps. */
- for (ii = 0; ii < iap->df; ++ii)
+ for (ii = 0; ii < iap->df_prod [iap->iact->n_vars - 1]; ++ii)
cat->reverse_variable_map_short[idx_short++] = i;
for (ii = 0; ii < iap->n_cats; ++ii)
assert (cat->n_vars <= cat->n_iap);
// categoricals_dump (cat);
+
+ /* Tally up the sums for all the encodings */
+ for (i = 0 ; i < cat->n_iap; ++i)
+ {
+ int x, y;
+ struct interact_params *iap = &cat->iap[i];
+ const struct interaction *iact = iap->iact;
+
+ const int df = iap->df_prod [iact->n_vars - 1];
+
+ iap->enc_sum = xcalloc (df, sizeof (*(iap->enc_sum)));
+
+ for (y = 0; y < hmap_count (&iap->ivmap); ++y)
+ {
+ struct interaction_value *iv = iap->reverse_interaction_value_map[y];
+ for (x = iap->base_subscript_short; x < iap->base_subscript_short + df ;++x)
+ {
+ const double bin = categoricals_get_binary_by_subscript (cat, x, iv->ccase); \
+ iap->enc_sum [x - iap->base_subscript_short] += bin * iv->cc;
+ }
+ }
+ }
}
return cat->iap[index].iact;
}
-
/* Return the case corresponding to SUBSCRIPT */
static const struct ccase *
categoricals_get_case_by_subscript (const struct categoricals *cat, int subscript)
int vindex = reverse_variable_lookup_short (cat, subscript);
const struct interact_params *vp = &cat->iap[vindex];
- const struct interaction_value *iv = vp->reverse_interaction_value_map [subscript - vp->base_subscript_short];
-
- if (iv == NULL)
- return 0;
-
- return iv->cc;
+ return vp->enc_sum[subscript - vp->base_subscript_short];
}
/* Returns unity if the value in case C at SUBSCRIPT is equal to the category
for that subscript */
double
-categoricals_get_binary_by_subscript (const struct categoricals *cat, int subscript,
+categoricals_get_binary_by_subscript (const struct categoricals *cat,
+ int subscript,
const struct ccase *c)
{
const struct interaction *iact = categoricals_get_interaction_by_subscript (cat, subscript);
- const struct ccase *c2 = categoricals_get_case_by_subscript (cat, subscript);
+ const int i = reverse_variable_lookup_short (cat, subscript);
+
+ const int base_index = cat->iap[i].base_subscript_short;
+
+ int v;
+ double result = 1.0;
+
+ const struct interact_params *iap = &cat->iap[i];
- if ( c2 == NULL)
- return 0;
+ double dfp = 1.0;
+ for (v = 0; v < iact->n_vars; ++v)
+ {
+ const struct variable *var = iact->vars[v];
- return interaction_case_equal (iact, c, c2);
+ const union value *val = case_data (c, var);
+ const int width = var_get_width (var);
+ const struct variable_node *vn = lookup_variable (&cat->varmap, var, hash_pointer (var, 0));
+
+ const unsigned int hash = value_hash (val, width, 0);
+ const struct value_node *valn = lookup_value (&vn->valmap, val, hash, width);
+
+ double bin = 1.0;
+
+ const double df = iap->df_prod[v] / dfp;
+
+ /* Translate the subscript into an index for the individual variable */
+ const int index = ((subscript - base_index) % iap->df_prod[v] ) / dfp;
+ dfp = iap->df_prod [v];
+
+#if EFFECTS_CODING
+ if ( valn->index == df )
+ bin = -1.0;
+ else
+#endif
+ if ( valn->index != index )
+ bin = 0;
+
+ result *= bin;
+ }
+
+ return result;
}
const struct interaction_value *iv = vp->reverse_interaction_value_map [subscript - vp->base_subscript_long];
return iv->user_data;
}
+
+
+
+
projects / pspp-builds.git / blobdiff