#include "gl/xalloc.h"
+#define EFFECTS_CODING 1
+
struct value_node
{
struct hmap_node node; /* Node in hash map. */
union value val; /* The value */
- void *user_data; /* A pointer to data which the caller can store stuff */
+ 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 */
+ double cc; /* Total of the weights of cases matching this interaction */
- /* Total of the weights of cases matching this interaction */
- double cc;
+ void *user_data; /* A pointer to data which the caller can store stuff */
};
static struct value_node *
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;
};
-#if 0
/* Comparison function to sort the reverse_value_map in ascending order */
static int
-compare_value_node (const void *vn1_, const void *vn2_, const void *aux)
+compare_interaction_value_3way (const void *vn1_, const void *vn2_, const void *aux)
{
- const struct value_node * const *vn1 = vn1_;
- const struct value_node * const *vn2 = vn2_;
- const struct interact_params *vp = aux;
+ const struct interaction_value *const *vn1p = vn1_;
+ const struct interaction_value *const *vn2p = vn2_;
+
+ const struct interact_params *iap = aux;
- return interaction_case_cmp_3way (vp->iact, (*vn1)->ccase, (*vn2)->ccase);
+ return interaction_case_cmp_3way (iap->iact, (*vn1p)->ccase, (*vn2p)->ccase);
}
-#endif
struct categoricals
{
void *aux2;
};
-
+#if 0
static void
categoricals_dump (const struct categoricals *cat)
{
int i;
-#if 1
+
printf ("Reverse Variable Map (short):\n");
for (i = 0; i < cat->df_sum; ++i)
{
}
printf ("\n");
+ printf ("Reverse Variable Map (long):\n");
+ for (i = 0; i < cat->n_cats_total; ++i)
+ {
+ printf (" %d", cat->reverse_variable_map_long[i]);
+ }
+ printf ("\n");
+
+
printf ("Number of interactions %d\n", cat->n_iap);
for (i = 0 ; i < cat->n_iap; ++i)
{
}
printf (")\n");
}
-#endif
}
-
+#endif
void
categoricals_destroy (struct categoricals *cat)
{
+ struct variable_node *vn = NULL;
+ int i;
+ if (NULL == cat)
+ return;
+ for (i = 0; i < cat->n_iap; ++i)
+ {
+ struct interaction_value *iv = NULL;
+ /* Interate over each interaction value, and unref any cases that we reffed */
+ HMAP_FOR_EACH (iv, struct interaction_value, node, &cat->iap[i].ivmap)
+ {
+ case_unref (iv->ccase);
+ }
+ hmap_destroy (&cat->iap[i].ivmap);
+ }
+
+ /* Interate over each variable and delete its value map */
+ HMAP_FOR_EACH (vn, struct variable_node, node, &cat->varmap)
+ {
+ hmap_destroy (&vn->valmap);
+ }
+
+ hmap_destroy (&cat->varmap);
+
+ pool_destroy (cat->pool);
+
free (cat);
}
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)
{
struct categoricals *
-categoricals_create (const struct interaction **inter, size_t n_inter,
+categoricals_create (struct interaction *const*inter, size_t n_inter,
const struct variable *wv, enum mv_class exclude,
user_data_create_func *udf,
update_func *update, void *aux1, void *aux2
{
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)
hmap_insert (&cat->iap[i].ivmap, &node->node, hash);
- // if (cat->user_data_create)
- // node->user_data = cat->user_data_create (cat->aux1, cat->aux2);
+ if (cat->user_data_create)
+ node->user_data = cat->user_data_create (cat->aux1, cat->aux2);
}
else
{
}
cat->iap[i].cc += weight;
- // if (cat->update)
- // cat->update (node->user_data, cat->exclude, cat->wv, NULL, c, cat->aux1, cat->aux2);
-
+ if (cat->update)
+ cat->update (node->user_data, cat->exclude, cat->wv, NULL, c, cat->aux1, cat->aux2);
}
}
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];
}
size_t
categoricals_n_total (const struct categoricals *cat)
{
+ assert (cat->reverse_variable_map_long);
+
return cat->n_cats_total;
}
/* 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 = pool_calloc (cat->pool, iap->n_cats,
sizeof *iap->reverse_interaction_value_map);
-
HMAP_FOR_EACH (ivn, struct interaction_value, node, &iap->ivmap)
{
iap->reverse_interaction_value_map[x++] = ivn;
}
-#if 0
+ assert (x <= iap->n_cats);
+
/* For some purposes (eg CONTRASTS in ONEWAY) the values need to be sorted */
- sort (vp->reverse_interaction_value_map, vp->n_cats, sizeof (const struct interaction_value *),
- compare_value_node, vp);
-#endif
+ sort (iap->reverse_interaction_value_map, x, sizeof (*iap->reverse_interaction_value_map),
+ compare_interaction_value_3way, iap);
+
+ /* Fill the remaining values with null */
+ for (ii = x ; ii < iap->n_cats; ++ii)
+ 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)
cat->reverse_variable_map_long[idx_long++] = i;
}
+ assert (cat->n_vars <= cat->n_iap);
+ // categoricals_dump (cat);
- assert (cat->n_vars <= cat->n_iap);
+ /* 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;
+ }
+ }
+ }
}
static int
reverse_variable_lookup_long (const struct categoricals *cat, int subscript)
{
- printf ("%s\n", __FUNCTION__);
assert (cat->reverse_variable_map_long);
assert (subscript >= 0);
assert (subscript < cat->n_cats_total);
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 *vn = vp->reverse_interaction_value_map [subscript - vp->base_subscript_short];
+
+ if ( vn == NULL)
+ return NULL;
+
return vn->ccase;
}
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];
-
- 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];
+
+ double dfp = 1.0;
+ for (v = 0; v < iact->n_vars; ++v)
+ {
+ const struct variable *var = iact->vars[v];
+
+ 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;
- return interaction_case_equal (iact, c, c2);
+ /* 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;
}
return cat->n_vars;
}
-
-
/* Return a case containing the set of values corresponding to SUBSCRIPT */
const struct ccase *
categoricals_get_case_by_category (const struct categoricals *cat, int subscript)
{
int vindex = reverse_variable_lookup_long (cat, subscript);
const struct interact_params *vp = &cat->iap[vindex];
- // const struct interaction_value *vn = vp->reverse_interaction_value_map [subscript - vp->base_subscript_long];
+ const struct interaction_value *vn = vp->reverse_interaction_value_map [subscript - vp->base_subscript_long];
- // return vn->ccase;
- return NULL;
+ return vn->ccase;
}
void *
int vindex = reverse_variable_lookup_long (cat, subscript);
const struct interact_params *vp = &cat->iap[vindex];
- //const struct value_node *vn = vp->reverse_interaction_value_map [subscript - vp->base_subscript_long];
- //return vn->user_data;
- assert (0);
- return NULL;
+ const struct interaction_value *iv = vp->reverse_interaction_value_map [subscript - vp->base_subscript_long];
+ return iv->user_data;
}
+
+
+
+
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