Merging upstream version 1.44.3.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 223 insertions, 0 deletions

diff --git a/ml/dlib/dlib/test/matrix_lu.cpp b/ml/dlib/dlib/test/matrix_lu.cpp
new file mode 100644
index 000000000..f5425b355
--- /dev/null
+++ b/ml/dlib/dlib/test/matrix_lu.cpp
@@ -0,0 +1,223 @@
+// Copyright (C) 2009  Davis E. King (davis@dlib.net)
+// License: Boost Software License   See LICENSE.txt for the full license.
+
+
+#include <dlib/matrix.h>
+#include <sstream>
+#include <string>
+#include <cstdlib>
+#include <ctime>
+#include <vector>
+#include "../stl_checked.h"
+#include "../array.h"
+#include "../rand.h"
+#include <dlib/string.h>
+
+#include "tester.h"
+
+namespace  
+{
+
+    using namespace test;
+    using namespace dlib;
+    using namespace std;
+
+    logger dlog("test.matrix_lu");
+
+    dlib::rand rnd;
+
+// ----------------------------------------------------------------------------------------
+
+    template <typename mat_type>
+    const matrix<typename mat_type::type> symm(const mat_type& m) { return m*trans(m); }
+
+// ----------------------------------------------------------------------------------------
+
+    template <typename type>
+    const matrix<type> randmat(long r, long c)
+    {
+        matrix<type> m(r,c);
+        for (long row = 0; row < m.nr(); ++row)
+        {
+            for (long col = 0; col < m.nc(); ++col)
+            {
+                m(row,col) = static_cast<type>(rnd.get_random_double()); 
+            }
+        }
+
+        return m;
+    }
+
+    template <typename type, long NR, long NC>
+    const matrix<type,NR,NC> randmat()
+    {
+        matrix<type,NR,NC> m;
+        for (long row = 0; row < m.nr(); ++row)
+        {
+            for (long col = 0; col < m.nc(); ++col)
+            {
+                m(row,col) = static_cast<type>(rnd.get_random_double()); 
+            }
+        }
+
+        return m;
+    }
+
+// ----------------------------------------------------------------------------------------
+
+    template <typename matrix_type>
+    void test_lu ( const matrix_type& m)
+    {
+        typedef typename matrix_type::type type;
+        const type eps = 10*max(abs(m))*sqrt(std::numeric_limits<type>::epsilon());
+        dlog << LDEBUG << "test_lu():  " << m.nr() << " x " << m.nc() << "  eps: " << eps;
+        print_spinner();
+
+
+        lu_decomposition<matrix_type> test(m);
+
+        DLIB_TEST(test.is_square() == (m.nr() == m.nc()));
+
+        DLIB_TEST(test.nr() == m.nr());
+        DLIB_TEST(test.nc() == m.nc());
+
+        dlog << LDEBUG << "m.nr(): " << m.nr() << "  m.nc(): " << m.nc();
+
+        type temp;
+        DLIB_TEST_MSG( (temp= max(abs(test.get_l()*test.get_u() - rowm(m,test.get_pivot())))) < eps,temp);
+
+        if (test.is_square())
+        {
+            // none of the matrices we should be passing in to test_lu() should be singular.  
+            DLIB_TEST_MSG (abs(test.det()) > eps/100, "det: " << test.det() );
+            dlog << LDEBUG << "big det: " << test.det();
+
+            DLIB_TEST(test.is_singular() == false);
+
+            matrix<type> m2;
+            matrix<type,0,1> col;
+
+            m2 = identity_matrix<type>(m.nr());
+            DLIB_TEST_MSG(equal(m*test.solve(m2), m2,eps),max(abs(m*test.solve(m2)- m2)));
+            m2 = randmat<type>(m.nr(),5);
+            DLIB_TEST_MSG(equal(m*test.solve(m2), m2,eps),max(abs(m*test.solve(m2)- m2)));
+            m2 = randmat<type>(m.nr(),1);
+            DLIB_TEST_MSG(equal(m*test.solve(m2), m2,eps),max(abs(m*test.solve(m2)- m2)));
+            col = randmat<type>(m.nr(),1);
+            DLIB_TEST_MSG(equal(m*test.solve(col), col,eps),max(abs(m*test.solve(m2)- m2)));
+
+            // now make us a singular matrix
+            if (m.nr() > 1)
+            {
+                matrix<type> sm(m);
+                set_colm(sm,0) = colm(sm,1);
+
+                lu_decomposition<matrix_type> test2(sm);
+                DLIB_TEST_MSG( (temp= max(abs(test2.get_l()*test2.get_u() - rowm(sm,test2.get_pivot())))) < eps,temp);
+
+                // these checks are only accurate for small matrices
+                if (test2.nr() < 100)
+                {
+                    DLIB_TEST_MSG(test2.is_singular() == true,"det: " << test2.det());
+                    DLIB_TEST_MSG(abs(test2.det()) < eps,"det: " << test2.det());
+                }
+
+            }
+        }
+
+    }
+
+// ----------------------------------------------------------------------------------------
+
+    void matrix_test_double()
+    {
+
+
+        test_lu(10*randmat<double>(2,2));
+        test_lu(10*randmat<double>(1,1));
+        test_lu(10*symm(randmat<double>(2,2)));
+        test_lu(10*randmat<double>(4,4));
+        test_lu(10*randmat<double>(9,4));
+        test_lu(10*randmat<double>(3,8));
+        test_lu(10*randmat<double>(15,15));
+        test_lu(2*symm(randmat<double>(15,15)));
+        test_lu(10*randmat<double>(100,100));
+        test_lu(10*randmat<double>(137,200));
+        test_lu(10*randmat<double>(200,101));
+
+        test_lu(10*randmat<double,2,2>());
+        test_lu(10*randmat<double,1,1>());
+        test_lu(10*randmat<double,4,3>());
+        test_lu(10*randmat<double,4,4>());
+        test_lu(10*randmat<double,9,4>());
+        test_lu(10*randmat<double,3,8>());
+        test_lu(10*randmat<double,15,15>());
+        test_lu(10*randmat<double,100,100>());
+        test_lu(10*randmat<double,137,200>());
+        test_lu(10*randmat<double,200,101>());
+
+        typedef matrix<double,0,0,default_memory_manager, column_major_layout> mat;
+        test_lu(mat(3*randmat<double>(4,4)));
+        test_lu(mat(3*randmat<double>(9,4)));
+        test_lu(mat(3*randmat<double>(3,8)));
+    }
+
+// ----------------------------------------------------------------------------------------
+
+    void matrix_test_float()
+    {
+
+    // -------------------------------
+
+        test_lu(3*randmat<float>(1,1));
+        test_lu(3*randmat<float>(2,2));
+        test_lu(3*randmat<float>(4,4));
+        test_lu(3*randmat<float>(9,4));
+        test_lu(3*randmat<float>(3,8));
+        test_lu(3*randmat<float>(137,200));
+        test_lu(3*randmat<float>(200,101));
+
+        test_lu(3*randmat<float,1,1>());
+        test_lu(3*randmat<float,2,2>());
+        test_lu(3*randmat<float,4,3>());
+        test_lu(3*randmat<float,4,4>());
+        test_lu(3*randmat<float,9,4>());
+        test_lu(3*randmat<float,3,8>());
+        test_lu(3*randmat<float,137,200>());
+        test_lu(3*randmat<float,200,101>());
+
+        typedef matrix<float,0,0,default_memory_manager, column_major_layout> mat;
+        test_lu(mat(3*randmat<float>(4,4)));
+        test_lu(mat(3*randmat<float>(9,4)));
+        test_lu(mat(3*randmat<float>(3,8)));
+    }
+
+// ----------------------------------------------------------------------------------------
+
+    class matrix_tester : public tester
+    {
+    public:
+        matrix_tester (
+        ) :
+            tester ("test_matrix_lu",
+                    "Runs tests on the matrix LU component.")
+        {
+            //rnd.set_seed(cast_to_string(time(0)));
+        }
+
+        void perform_test (
+        )
+        {
+            dlog << LINFO << "seed string: " << rnd.get_seed();
+
+            dlog << LINFO << "begin testing with double";
+            matrix_test_double();
+            dlog << LINFO << "begin testing with float";
+            matrix_test_float();
+        }
+    } a;
+
+}
+
+
+