#include "libpspp/hmap.h"
#include "libpspp/pool.h"
#include "libpspp/str.h"
+#include "libpspp/hash-functions.h"
#include "gl/xalloc.h"
+#define EFFECTS_CODING 1
+
struct value_node
{
struct hmap_node node; /* Node in hash map. */
- struct ccase *ccase;
- double cc; /* The total of the weights of cases with this value */
+
+ 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 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 */
void *user_data; /* A pointer to data which the caller can store stuff */
+};
- int subscript; /* A zero based integer, unique within the variable.
- Can be used as an index into an array */
+static struct value_node *
+lookup_value (const struct hmap *map, const union value *val, unsigned int hash, int width)
+{
+ struct value_node *vn = NULL;
+ HMAP_FOR_EACH_WITH_HASH (vn, struct value_node, node, hash, map)
+ {
+ if (value_equal (&vn->val, val, width))
+ break;
+ }
+
+ return vn;
+}
+
+struct variable_node
+{
+ struct hmap_node node; /* Node in hash map. */
+ 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)
+{
+ struct string str = DS_EMPTY_INITIALIZER;
+ interaction_to_string (iact, &str);
+ printf ("Interaction: %s\n", ds_cstr (&str));
+ ds_destroy (&str);
+}
+#endif
+
+
+static struct variable_node *
+lookup_variable (const struct hmap *map, const struct variable *var, unsigned int hash)
+{
+ struct variable_node *vn = NULL;
+ HMAP_FOR_EACH_WITH_HASH (vn, struct variable_node, node, hash, map)
+ {
+ if (vn->var == var)
+ break;
+
+ fprintf (stderr, "Warning: Hash table collision\n");
+ }
+
+ return vn;
+}
+
+
struct interact_params
{
- /* A map indexed by a union values */
- struct hmap map;
+ /* A map indexed by a interaction_value */
+ struct hmap ivmap;
const struct interaction *iact;
int base_subscript_short;
int base_subscript_long;
- /* The number of distinct values of this variable */
+ /* The number of distinct values of this interaction */
int n_cats;
- /* A map of values indexed by subscript */
- const struct value_node **reverse_value_map;
+ /* 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;
- /* Total of the weights of this variable */
- double cc;
+ /* A map of interaction_values indexed by subscript */
+ struct interaction_value **reverse_interaction_value_map;
+
+ double cc;
};
/* 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_;
- return interaction_case_cmp_3way (vp->iact, (*vn1)->ccase, (*vn2)->ccase);
-}
+ const struct interact_params *iap = aux;
+ return interaction_case_cmp_3way (iap->iact, (*vn1p)->ccase, (*vn2p)->ccase);
+}
struct categoricals
{
/* An array of interact_params */
struct interact_params *iap;
+ /* Map whose members are the union of the variables which comprise IAP */
+ struct hmap varmap;
+
/* The size of IAP. (ie, the number of interactions involved.) */
size_t n_iap;
In the absence of missing values, this will be equal to N_IAP */
size_t n_vars;
+ size_t df_sum;
+
/* A map to enable the lookup of variables indexed by subscript.
This map considers only the N - 1 of the N variables.
*/
void *aux2;
};
-
-void
-categoricals_destroy ( struct categoricals *cat)
+#if 0
+static void
+categoricals_dump (const struct categoricals *cat)
{
int i;
- if (cat != NULL)
+
+ printf ("Reverse Variable Map (short):\n");
+ for (i = 0; i < cat->df_sum; ++i)
{
- for (i = 0 ; i < cat->n_iap; ++i)
- {
- struct hmap *map = &cat->iap[i].map;
- struct value_node *nn;
+ printf (" %d", cat->reverse_variable_map_short[i]);
+ }
+ printf ("\n");
- HMAP_FOR_EACH (nn, struct value_node, node, map)
- {
- case_unref (nn->ccase);
- }
+ 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)
+ {
+ int v;
+ struct string str;
+ const struct interact_params *iap = &cat->iap[i];
+ const struct interaction *iact = iap->iact;
+
+ ds_init_empty (&str);
+ interaction_to_string (iact, &str);
+
+ printf ("\nInteraction: %s (n: %d; df: %d ); ", ds_cstr (&str), iap->n_cats, iap->df);
+ ds_destroy (&str);
+ printf ("Base subscript: %d\n", iap->base_subscript_short);
+
+ printf ("\t(");
+ for (v = 0; v < hmap_count (&iap->ivmap); ++v)
+ {
+ int vv;
+ const struct interaction_value *iv = iap->reverse_interaction_value_map[v];
- hmap_destroy (map);
+ if (v > 0) printf (" ");
+ printf ("{");
+ for (vv = 0; vv < iact->n_vars; ++vv)
+ {
+ const struct variable *var = iact->vars[vv];
+ const union value *val = case_data (iv->ccase, var);
+
+ printf ("%g", val->f);
+ if (vv < iact->n_vars - 1)
+ printf (", ");
+ }
+ printf ("}");
}
-
- pool_destroy (cat->pool);
- free (cat);
+ printf (")\n");
}
}
+#endif
-
-#if 0
void
-categoricals_dump (const struct categoricals *cat)
+categoricals_destroy (struct categoricals *cat)
{
- int v;
-
- for (v = 0 ; v < cat->n_iap; ++v)
+ struct variable_node *vn = NULL;
+ int i;
+ if (NULL == cat)
+ return;
+ for (i = 0; i < cat->n_iap; ++i)
{
- const struct interact_params *vp = &cat->vp[v];
- const struct hmap *m = &vp->map;
- struct hmap_node *node ;
- int x;
-
- printf ("\n%s (%d) CC=%g n_cats=%d:\n",
- var_get_name (vp->var), vp->base_subscript_long, vp->cc, vp->n_cats);
-
- printf ("Reverse map\n");
- for (x = 0 ; x < vp->n_cats; ++x)
- {
- struct string s;
- const struct value_node *vn = vp->reverse_value_map[x];
- ds_init_empty (&s);
- var_append_value_name (vp->var, &vn->value, &s);
- printf ("Value for %d is %s\n", x, ds_cstr(&s));
- ds_destroy (&s);
- }
-
- printf ("\nForward map\n");
- for (node = hmap_first (m); node; node = hmap_next (m, node))
+ 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)
{
- struct string s;
- const struct value_node *vn = HMAP_DATA (node, struct value_node, node);
- ds_init_empty (&s);
- var_append_value_name (vp->var, &vn->value, &s);
- printf ("Value: %s; Index %d; CC %g\n",
- ds_cstr (&s),
- vn->subscript, vn->cc);
- ds_destroy (&s);
+ case_unref (iv->ccase);
}
+ hmap_destroy (&cat->iap[i].ivmap);
}
- assert (cat->n_vars <= cat->n_iap);
-
- printf ("\n");
- printf ("Number of categorical variables: %d\n", cat->n_iap);
- printf ("Number of non-empty categorical variables: %d\n", cat->n_vars);
- printf ("Total number of categories: %d\n", cat->n_cats_total);
+ /* Interate over each variable and delete its value map */
+ HMAP_FOR_EACH (vn, struct variable_node, node, &cat->varmap)
+ {
+ hmap_destroy (&vn->valmap);
+ }
- printf ("\nReverse variable map (short):\n");
- for (v = 0 ; v < cat->n_cats_total - cat->n_vars; ++v)
- printf ("%d ", cat->reverse_variable_map_short[v]);
+ hmap_destroy (&cat->varmap);
- printf ("\nReverse variable map (long):\n");
- for (v = 0 ; v < cat->n_cats_total; ++v)
- printf ("%d ", cat->reverse_variable_map_long[v]);
+ pool_destroy (cat->pool);
- printf ("\n");
+ free (cat);
}
-#endif
-static struct value_node *
+
+static struct interaction_value *
lookup_case (const struct hmap *map, const struct interaction *iact, const struct ccase *c)
{
- struct value_node *nn;
- size_t hash = interaction_case_hash (iact, c);
+ struct interaction_value *iv = NULL;
+ size_t hash = interaction_case_hash (iact, c, 0);
- HMAP_FOR_EACH_WITH_HASH (nn, struct value_node, node, hash, map)
+ HMAP_FOR_EACH_WITH_HASH (iv, struct interaction_value, node, hash, map)
{
- if (interaction_case_equal (iact, c, nn->ccase))
+ if (interaction_case_equal (iact, c, iv->ccase))
break;
fprintf (stderr, "Warning: Hash table collision\n");
}
- return nn;
+ return iv;
}
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
cat->aux1 = aux1;
cat->aux2 = aux2;
-
cat->iap = pool_calloc (cat->pool, cat->n_iap, sizeof *cat->iap);
+ hmap_init (&cat->varmap);
for (i = 0 ; i < cat->n_iap; ++i)
{
- hmap_init (&cat->iap[i].map);
+ int v;
+ hmap_init (&cat->iap[i].ivmap);
cat->iap[i].iact = inter[i];
+ cat->iap[i].cc = 0.0;
+ for (v = 0; v < inter[i]->n_vars; ++v)
+ {
+ const struct variable *var = inter[i]->vars[v];
+ unsigned int hash = hash_pointer (var, 0);
+ struct variable_node *vn = lookup_variable (&cat->varmap, var, hash);
+ if (vn == NULL)
+ {
+ 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);
+ }
+ }
}
return cat;
void
categoricals_update (struct categoricals *cat, const struct ccase *c)
{
- size_t i;
-
+ int i;
+ struct variable_node *vn = NULL;
const double weight = cat->wv ? case_data (c, cat->wv)->f : 1.0;
assert (NULL == cat->reverse_variable_map_short);
assert (NULL == cat->reverse_variable_map_long);
+ /* Interate over each variable, and add the value of that variable
+ to the appropriate map, if it's not already present. */
+ HMAP_FOR_EACH (vn, struct variable_node, node, &cat->varmap)
+ {
+ const int width = var_get_width (vn->var);
+ const union value *val = case_data (c, vn->var);
+ unsigned int hash = value_hash (val, width, 0);
+
+ struct value_node *valn = lookup_value (&vn->valmap, val, hash, width);
+ 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;
- size_t hash;
- struct value_node *node ;
- if ( interaction_case_is_missing (iact, c, cat->exclude))
- continue;
+ // if ( interaction_case_is_missing (iact, c, cat->exclude))
+ // continue;
- hash = interaction_case_hash (iact, c);
- node = lookup_case (&cat->iap[i].map, 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)
{
node = pool_malloc (cat->pool, sizeof *node);
node->ccase = case_ref (c);
- node->cc = 0.0;
+ node->cc = weight;
- hmap_insert (&cat->iap[i].map, &node->node, hash);
- cat->n_cats_total++;
-
- if ( 0 == cat->iap[i].n_cats)
- cat->n_vars++;
-
- node->subscript = cat->iap[i].n_cats++ ;
+ 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);
}
-
- node->cc += weight;
+ else
+ {
+ node->cc += weight;
+ }
cat->iap[i].cc += weight;
if (cat->update)
- cat->update (node->user_data, cat->exclude, cat->wv, NULL, c, cat->aux1, cat->aux2);
+ cat->update (node->user_data, cat->exclude, cat->wv, NULL, c, cat->aux1, cat->aux2);
}
}
-/* Return the number of categories (distinct values) for variable N */
+/* Return the number of categories (distinct values) for interction N */
size_t
categoricals_n_count (const struct categoricals *cat, size_t n)
{
- return hmap_count (&cat->iap[n].map);
+ return hmap_count (&cat->iap[n].ivmap);
+}
+
+
+size_t
+categoricals_df (const struct categoricals *cat, size_t n)
+{
+ const struct interact_params *iap = &cat->iap[n];
+ return iap->df_prod[iap->iact->n_vars - 1];
}
/* Return the total number of categories */
size_t
-categoricals_total (const struct categoricals *cat)
+categoricals_n_total (const struct categoricals *cat)
{
+ assert (cat->reverse_variable_map_long);
+
return cat->n_cats_total;
}
+size_t
+categoricals_df_total (const struct categoricals *cat)
+{
+ return cat->df_sum;
+}
/* This function must be called *before* any call to categoricals_get_*_by subscript and
*after* all calls to categoricals_update */
*/
struct categoricals *cat = CONST_CAST (struct categoricals *, cat_);
int v;
+ int i;
int idx_short = 0;
int idx_long = 0;
+ cat->df_sum = 0;
+ cat->n_cats_total = 0;
+
+ /* 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_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_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_prod [v - 1];
+ cat->n_cats_total += cat->iap[i].n_cats;
+ }
+
+
cat->reverse_variable_map_short = pool_calloc (cat->pool,
- cat->n_cats_total - cat->n_vars,
+ cat->df_sum,
sizeof *cat->reverse_variable_map_short);
cat->reverse_variable_map_long = pool_calloc (cat->pool,
cat->n_cats_total,
sizeof *cat->reverse_variable_map_long);
-
- for (v = 0 ; v < cat->n_iap; ++v)
+
+ for (i = 0 ; i < cat->n_iap; ++i)
{
- int i;
- struct interact_params *vp = &cat->iap[v];
- int n_cats_total = categoricals_n_count (cat, v);
- struct hmap_node *node ;
+ struct interaction_value *ivn = NULL;
+ int x = 0;
+ int ii;
+ struct interact_params *iap = &cat->iap[i];
- vp->reverse_value_map = pool_calloc (cat->pool, n_cats_total, sizeof *vp->reverse_value_map);
+ iap->base_subscript_short = idx_short;
+ iap->base_subscript_long = idx_long;
- vp->base_subscript_short = idx_short;
- vp->base_subscript_long = idx_long;
+ iap->reverse_interaction_value_map = pool_calloc (cat->pool, iap->n_cats,
+ sizeof *iap->reverse_interaction_value_map);
- for (node = hmap_first (&vp->map); node; node = hmap_next (&vp->map, node))
+ HMAP_FOR_EACH (ivn, struct interaction_value, node, &iap->ivmap)
{
- const struct value_node *vn = HMAP_DATA (node, struct value_node, node);
- vp->reverse_value_map[vn->subscript] = vn;
+ iap->reverse_interaction_value_map[x++] = ivn;
}
+ assert (x <= iap->n_cats);
+
/* For some purposes (eg CONTRASTS in ONEWAY) the values need to be sorted */
- sort (vp->reverse_value_map, vp->n_cats, sizeof (const struct value_node *),
- compare_value_node, vp);
+ 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 (i = 0; i < vp->n_cats - 1; ++i)
- cat->reverse_variable_map_short[idx_short++] = v;
+ for (ii = 0; ii < iap->df_prod [iap->iact->n_vars - 1]; ++ii)
+ cat->reverse_variable_map_short[idx_short++] = i;
- for (i = 0; i < vp->n_cats; ++i)
- cat->reverse_variable_map_long[idx_long++] = v;
+ 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);
+
+ /* 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;
+ }
+ }
+ }
}
{
assert (cat->reverse_variable_map_short);
assert (subscript >= 0);
- assert (subscript < cat->n_cats_total - cat->n_vars);
+ assert (subscript < cat->df_sum);
return cat->reverse_variable_map_short[subscript];
}
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 value_node *vn = vp->reverse_value_map [subscript - vp->base_subscript_short];
+ 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 value_node *vn = vp->reverse_value_map [subscript - vp->base_subscript_short];
- return vn->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;
- return interaction_case_equal (iact, c, c2);
+ 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;
}
size_t
categoricals_get_n_variables (const struct categoricals *cat)
{
+ printf ("%s\n", __FUNCTION__);
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 value_node *vn = vp->reverse_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;
}
-
void *
categoricals_get_user_data_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 value_node *vn = vp->reverse_value_map [subscript - vp->base_subscript_long];
- return vn->user_data;
+ const struct interaction_value *iv = vp->reverse_interaction_value_map [subscript - vp->base_subscript_long];
+ return iv->user_data;
}
+
+
+
+
projects / pspp-builds.git / blobdiff