* Here we examine manipulations on GiNaC's symbolic matrices. */
/*
- * GiNaC Copyright (C) 1999-2000 Johannes Gutenberg University Mainz, Germany
+ * GiNaC Copyright (C) 1999-2004 Johannes Gutenberg University Mainz, Germany
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
#include <stdexcept>
#include "exams.h"
-static unsigned matrix_determinants(void)
+static unsigned matrix_determinants()
{
unsigned result = 0;
ex det;
return result;
}
-static unsigned matrix_invert1(void)
+static unsigned matrix_invert1()
{
unsigned result = 0;
matrix m(1,1);
return result;
}
-static unsigned matrix_invert2(void)
+static unsigned matrix_invert2()
{
unsigned result = 0;
matrix m(2,2);
return result;
}
-static unsigned matrix_invert3(void)
+static unsigned matrix_invert3()
{
unsigned result = 0;
matrix m(3,3);
return result;
}
-static unsigned matrix_solve2(void)
+static unsigned matrix_solve2()
{
// check the solution of the multiple system A*X = B:
// [ 1 2 -1 ] [ x0 y0 ] [ 4 0 ]
return result;
}
-static unsigned matrix_misc(void)
+static unsigned matrix_evalm()
+{
+ unsigned result = 0;
+
+ matrix S(2, 2, lst(
+ 1, 2,
+ 3, 4
+ )), T(2, 2, lst(
+ 1, 1,
+ 2, -1
+ )), R(2, 2, lst(
+ 27, 14,
+ 36, 26
+ ));
+
+ ex e = ((S + T) * (S + 2*T));
+ ex f = e.evalm();
+ if (!f.is_equal(R)) {
+ clog << "Evaluating " << e << " erroneously returned " << f << " instead of " << R << endl;
+ result++;
+ }
+
+ return result;
+}
+
+static unsigned matrix_misc()
{
unsigned result = 0;
matrix m1(2,2);
return result;
}
-unsigned exam_matrices(void)
+unsigned exam_matrices()
{
unsigned result = 0;
result += matrix_invert2(); cout << '.' << flush;
result += matrix_invert3(); cout << '.' << flush;
result += matrix_solve2(); cout << '.' << flush;
+ result += matrix_evalm(); cout << "." << flush;
result += matrix_misc(); cout << '.' << flush;
if (!result) {