add octave testfiles to git

1 files changed, 70 insertions, 0 deletions

diff --git a/tests/aux/test_kernel_cross.m b/tests/aux/test_kernel_cross.m
new file mode 100644
index 0000000..5777afd
--- /dev/null
+++ b/tests/aux/test_kernel_cross.m
@@ -0,0 +1,70 @@
+
+function test_kernel_cross(kerneltype)
+
+clc;
+rand('state', 123456);
+more off;
+
+n_1 = 10;
+n_2 = 5;
+m = 3;
+
+X_1 = rand(n_1, m);
+Z_1 = [ones(n_1, 1), X_1];
+X_2 = rand(n_2, m);
+Z_2 = [ones(n_2, 1), X_2];
+
+for ii=1:n_1
+  for jj=1:m+1
+    fprintf("matrix_set(data_1->RAW, data_1->m+1, %i, %i, %.16f);\n", ii-1, jj-1, Z_1(ii, jj));
+  end
+end
+
+fprintf('\n');
+for ii=1:n_2
+  for jj=1:m+1
+    fprintf("matrix_set(data_2->RAW, data_2->m+1, %i, %i, %.16f);\n", ii-1, jj-1, Z_2(ii, jj));
+  end
+end
+
+
+K = zeros(n_2, n_1);
+if strcmp(kerneltype, 'poly')
+  # Polynomial kernel
+  # (gamma * <x_1, x_2> + c)^d
+  gamma = 1.5;
+  c = 3.0;
+  d = 1.78;
+  
+  for ii=1:n_2
+    for jj=1:n_1
+      K(ii, jj) = (gamma * (X_2(ii, :) * X_1(jj, :)') + c)^d;
+    end
+  end
+elseif strcmp(kerneltype, 'rbf')
+  # RBF kernel
+  # exp(-gamma * norm(x1 - x2)^2)
+  gamma = 0.348
+  for ii=1:n_2
+    for jj=1:n_1
+      K(ii, jj) = exp(-gamma * sum((X_2(ii, :) - X_1(jj, :)).^2));
+    end
+  end
+elseif strcmp(kerneltype, 'sigmoid')
+  # Sigmoid kernel
+  # tanh(gamma * <x_1, x_2> + c)
+  gamma = 1.23;
+  c = 1.6;
+  for ii=1:n_2
+    for jj=1:n_1
+      K(ii, jj) = tanh(gamma * (X_2(ii, :) * X_1(jj, :)') + c);
+    end
+  end
+end
+
+fprintf('\n');
+for ii=1:n_2
+  for jj=1:n_1
+    fprintf("mu_assert(fabs(matrix_get(K2, data_1->n, %i, %i) -\n %.16f) < eps,\n\"Incorrect K2 at %i, %i\");\n", ii-1, jj-1, K(ii, jj), ii-1, jj-1);
+  end
+end
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