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// Copyright (C) 2009 Davis E. King (davis@dlib.net)
// License: Boost Software License See LICENSE.txt for the full license.
#include "tester.h"
#include <dlib/svm.h>
#include <vector>
#include <sstream>
namespace
{
using namespace test;
using namespace dlib;
using namespace std;
dlib::logger dlog("test.kernel_matrix");
class kernel_matrix_tester : public tester
{
/*!
WHAT THIS OBJECT REPRESENTS
This object represents a unit test. When it is constructed
it adds itself into the testing framework.
!*/
public:
kernel_matrix_tester (
) :
tester (
"test_kernel_matrix", // the command line argument name for this test
"Run tests on the kernel_matrix functions.", // the command line argument description
0 // the number of command line arguments for this test
)
{
}
void perform_test (
)
{
print_spinner();
typedef matrix<double,0,1> sample_type;
typedef radial_basis_kernel<sample_type> kernel_type;
kernel_type kern(0.1);
std::vector<sample_type> vect1;
std::vector<sample_type> vect2;
const sample_type samp = randm(4,1);
sample_type samp2, samp3;
vect1.push_back(randm(4,1));
vect1.push_back(randm(4,1));
vect1.push_back(randm(4,1));
vect1.push_back(randm(4,1));
vect2.push_back(randm(4,1));
vect2.push_back(randm(4,1));
vect2.push_back(randm(4,1));
vect2.push_back(randm(4,1));
vect2.push_back(randm(4,1));
matrix<double> K;
K.set_size(vect1.size(), vect2.size());
for (long r = 0; r < K.nr(); ++r)
{
for (long c = 0; c < K.nc(); ++c)
{
K(r,c) = kern(vect1[r], vect2[c]);
}
}
DLIB_TEST(equal(K, kernel_matrix(kern, vect1, vect2)));
DLIB_TEST(equal(K, kernel_matrix(kern, vector_to_matrix(vect1), vector_to_matrix(vect2))));
K.set_size(vect2.size(), vect1.size());
for (long r = 0; r < K.nr(); ++r)
{
for (long c = 0; c < K.nc(); ++c)
{
K(r,c) = kern(vect2[r], vect1[c]);
}
}
DLIB_TEST(equal(K, kernel_matrix(kern, vect2, vect1)));
DLIB_TEST(equal(K, tmp(kernel_matrix(kern, vect2, vect1))));
DLIB_TEST(equal(K, kernel_matrix(kern, vector_to_matrix(vect2), vector_to_matrix(vect1))));
K.set_size(vect1.size(), vect1.size());
for (long r = 0; r < K.nr(); ++r)
{
for (long c = 0; c < K.nc(); ++c)
{
K(r,c) = kern(vect1[r], vect1[c]);
}
}
DLIB_TEST(equal(K, kernel_matrix(kern, vect1, vect1)));
DLIB_TEST(equal(K, tmp(kernel_matrix(kern, vect1, vect1))));
DLIB_TEST(equal(K, kernel_matrix(kern, vect1)));
DLIB_TEST(equal(K, tmp(kernel_matrix(kern, vect1))));
DLIB_TEST(equal(K, kernel_matrix(kern, vector_to_matrix(vect1), vector_to_matrix(vect1))));
DLIB_TEST(equal(K, tmp(kernel_matrix(kern, vector_to_matrix(vect1), vector_to_matrix(vect1)))));
DLIB_TEST(equal(K, kernel_matrix(kern, vector_to_matrix(vect1))));
DLIB_TEST(equal(K, tmp(kernel_matrix(kern, vector_to_matrix(vect1)))));
K.set_size(vect1.size(),1);
for (long r = 0; r < K.nr(); ++r)
{
for (long c = 0; c < K.nc(); ++c)
{
K(r,c) = kern(vect1[r], samp);
}
}
DLIB_TEST(equal(K, kernel_matrix(kern, vect1, samp)));
DLIB_TEST(equal(K, kernel_matrix(kern, vector_to_matrix(vect1), samp)));
K.set_size(1, vect1.size());
for (long r = 0; r < K.nr(); ++r)
{
for (long c = 0; c < K.nc(); ++c)
{
K(r,c) = kern(samp, vect1[c]);
}
}
DLIB_TEST(equal(K, kernel_matrix(kern, samp, vect1)));
DLIB_TEST(equal(K, kernel_matrix(kern, samp, vector_to_matrix(vect1))));
DLIB_TEST(equal(K, tmp(kernel_matrix(kern, samp, vect1))));
DLIB_TEST(equal(K, tmp(kernel_matrix(kern, samp, vector_to_matrix(vect1)))));
samp2 = samp;
samp3 = samp;
// test the alias detection
samp2 = kernel_matrix(kern, vect1, samp2);
DLIB_TEST(equal(samp2, kernel_matrix(kern, vect1, samp)));
samp3 = trans(kernel_matrix(kern, samp3, vect2));
DLIB_TEST(equal(samp3, trans(kernel_matrix(kern, samp, vect2))));
samp2 += kernel_matrix(kern, vect1, samp);
DLIB_TEST(equal(samp2, 2*kernel_matrix(kern, vect1, samp)));
samp3 += trans(kernel_matrix(kern, samp, vect2));
DLIB_TEST(equal(samp3, 2*trans(kernel_matrix(kern, samp, vect2))));
}
};
// Create an instance of this object. Doing this causes this test
// to be automatically inserted into the testing framework whenever this cpp file
// is linked into the project. Note that since we are inside an unnamed-namespace
// we won't get any linker errors about the symbol a being defined multiple times.
kernel_matrix_tester a;
}
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