New function covariance_calculate_unnormalized

[pspp-builds.git] / src / math / covariance.h

diff --git a/src/math/covariance.h b/src/math/covariance.h
index 8b8de88e9fa0b1ebfa277f9d25b41e6bf8e5ed0a..3d29dcea8b0193babed4238ef64a988b7fbb92a3 100644 (file)
--- a/src/math/covariance.h
+++ b/src/math/covariance.h
@@ -27,12 +27,20 @@ struct covariance;
 struct variable;
 struct ccase ;
 
-struct covariance * covariance_create (size_t n_vars, const struct variable **vars, 
-                                      const struct variable *wv, enum mv_class excl);
+struct covariance * covariance_1pass_create (size_t n_vars, const struct variable **vars, 
+                                            const struct variable *wv, enum mv_class excl);
+
+struct covariance *
+covariance_2pass_create (size_t n_vars, const struct variable **vars,
+                        size_t n_catvars, const struct variable **catvars, 
+                        const struct variable *wv, enum mv_class excl);
 
 void covariance_accumulate (struct covariance *, const struct ccase *);
+void covariance_accumulate_pass1 (struct covariance *, const struct ccase *);
+void covariance_accumulate_pass2 (struct covariance *, const struct ccase *);
 
 const gsl_matrix * covariance_calculate (struct covariance *cov);
+const gsl_matrix * covariance_calculate_unnormalized (struct covariance *);
 
 void covariance_destroy (struct covariance *cov);