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function kernel_tests(kerneltype)
rand('state', 123456);
more off;
n = 10;
m = 3;
X = rand(n, m);
Z = [ones(n, 1), X];
for ii=1:n
for jj=1:m+1
fprintf("matrix_set(data->RAW, data->m+1, %i, %i, %.16f);\n", ii-1, jj-1, Z(ii, jj));
end
end
K = zeros(n, n);
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
for jj=1:n
K(ii, jj) = (gamma * (X(ii, :) * X(jj, :)') + c)^d;
end
end
elseif strcmp(kerneltype, 'rbf')
# RBF kernel
# exp(-gamma * norm(x1 - x2)^2)
gamma = 0.348
for ii=1:n
for jj=1:n
K(ii, jj) = exp(-gamma * sum((X(ii, :) - X(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
for jj=1:n
K(ii, jj) = tanh(gamma * (X(ii, :) * X(jj, :)') + c);
end
end
end
fprintf('\n');
for ii=1:n
for jj=1:n
fprintf("mu_assert(fabs(matrix_get(K, data->n, %i, %i) -\n %.16f) < eps,\n\"Incorrect K at %i, %i\");\n", ii-1, jj-1, K(ii, jj), ii-1, jj-1);
end
end
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