Add prototype for design_matrix_clone() to design-matrix.h.

diff --git a/src/math/design-matrix.h b/src/math/design-matrix.h
index ad2b82585229c3d9c52d119865f7dfe76e2d9bd3..8d56d010c5974f0ebf558dc3d12989f96e96f093 100644 (file)
--- a/src/math/design-matrix.h
+++ b/src/math/design-matrix.h
@@ -75,6 +75,8 @@ void design_matrix_set_numeric (struct design_matrix *, size_t,
                                    const struct variable *,
                                    const union value *);
 
+struct design_matrix *design_matrix_clone (const struct design_matrix *);
+
 size_t design_matrix_var_to_column (const struct design_matrix *,
                                    const struct variable *);