X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fmath%2Fdesign-matrix.c;h=8f125c58b1e734d3b5d38ce1262e1e4477280edd;hb=124dea11f9542304e35bef92b7f3a46d5afca4d7;hp=298d03357b7208e66392c0b15bec0eb9e0f0146b;hpb=9f087e7aa4cdff1d5d46d5e188c0017a9d2d0029;p=pspp-builds.git

diff --git a/src/math/design-matrix.c b/src/math/design-matrix.c
index 298d0335..8f125c58 100644
--- a/src/math/design-matrix.c
+++ b/src/math/design-matrix.c
@@ -54,10 +54,12 @@ design_matrix_create (int n_variables,
 
   dm = xmalloc (sizeof *dm);
   dm->vars = xnmalloc (n_variables, sizeof *dm->vars);
+  dm->n_cases = xnmalloc (n_variables, sizeof (*dm->n_cases));
   dm->n_vars = n_variables;
 
   for (i = 0; i < n_variables; i++)
     {
+      dm->n_cases[i] = 0;
       v = v_variables[i];
       assert ((dm->vars + i) != NULL);
       (dm->vars + i)->v = v;	/* Allows us to look up the variable from
@@ -79,6 +81,7 @@ design_matrix_create (int n_variables,
   dm->m = gsl_matrix_calloc (n_data, n_cols);
   col = 0;
 
+  
   return dm;
 }
 
@@ -87,6 +90,7 @@ design_matrix_destroy (struct design_matrix *dm)
 {
   free (dm->vars);
   gsl_matrix_free (dm->m);
+  free (dm->n_cases);
   free (dm);
 }
 
@@ -191,3 +195,113 @@ design_matrix_set_numeric (struct design_matrix *dm, size_t row,
   assert (col != DM_COLUMN_NOT_FOUND);
   gsl_matrix_set (dm->m, row, col, val->f);
 }
+
+struct design_matrix *
+design_matrix_clone (const struct design_matrix *dm)
+{
+  struct design_matrix *result;
+  size_t i;
+  
+  assert (dm != NULL);
+  result = xmalloc (sizeof *result);
+  result->vars = xnmalloc (dm->n_vars, sizeof *dm->vars);
+  result->n_vars = dm->n_vars;
+  result->m = gsl_matrix_alloc (dm->m->size1, dm->m->size2);
+  
+  gsl_matrix_memcpy (result->m, dm->m);
+  for (i = 0; i < result->n_vars; i++)
+    {
+      result->vars[i] = dm->vars[i];
+    }
+  return result;
+}
+
+/*
+  Increment the number of cases for V.
+ */
+void 
+design_matrix_increment_case_count (struct design_matrix *dm, const struct variable *v)
+{
+  size_t i;
+  assert (dm != NULL);
+  assert (dm->n_cases != NULL);
+  assert (v != NULL);
+  i = design_matrix_var_to_column (dm, v);
+  dm->n_cases[i]++;
+}
+
+/*
+  Set the number of cases for V.
+ */
+void 
+design_matrix_set_case_count (struct design_matrix *dm, const struct variable *v, size_t n)
+{
+  size_t i;
+  assert (dm != NULL);
+  assert (dm->n_cases != NULL);
+  assert (v != NULL);
+  i = design_matrix_var_to_column (dm, v);
+  dm->n_cases[i] = n;
+}
+
+/*
+  Get the number of cases for V.
+ */
+size_t 
+design_matrix_get_case_count (const struct design_matrix *dm, const struct variable *v)
+{
+  size_t i;
+  assert (dm != NULL);
+  assert (dm->n_cases != NULL);
+  assert (v != NULL);
+  i = design_matrix_var_to_column (dm, v);
+  return dm->n_cases[i];
+}
+
+size_t
+design_matrix_get_n_cols (const struct design_matrix *d)
+{
+  return d->m->size2;
+}
+
+size_t
+design_matrix_get_n_rows (const struct design_matrix *d)
+{
+  return d->m->size1;
+}
+
+double
+design_matrix_get_element (const struct design_matrix *d, size_t row, size_t col)
+{
+  return (gsl_matrix_get (d->m, row, col));
+}
+
+void
+design_matrix_set_element (const struct design_matrix *d, size_t row, size_t col, double x)
+{
+  gsl_matrix_set (d->m, row, col, x);
+}
+
+/*
+  Return the subscript of the column of the design matrix
+  corresponding to VAL. If VAR is categorical with d categories, its
+  first category should correspond to the origin in d-dimensional
+  Euclidean space, so there is no subscript for this value.
+ */
+size_t
+dm_get_exact_subscript (const struct design_matrix *dm, const struct variable *var,
+		     const union value *val)
+{
+  size_t result;
+
+  result = design_matrix_var_to_column (dm, var);
+  if (var_is_alpha (var))
+    {
+      if (cat_is_origin (var, val))
+	{
+	  return -1u;
+	}
+      result += cat_value_find (var, val) - 1;
+    }
+  return result;
+}