Cody

Problem 930. 1D DCT-II transform.

Solution 3317398

Submitted on 21 Oct 2020 by Rafael S.T. Vieira
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Test Suite

Test Status Code Input and Output
1   Pass
x = eye(4); y = mydct(mydct(x)); y_corr = eye(4); assert( norm( y_corr(:) - y(:)) < 1e-10 );

r = 0.5000 0.6533 0.5000 0.2706 r = 0.5000 0.6533 0.5000 0.2706 0.5000 0.2706 -0.5000 -0.6533 r = 0.5000 0.6533 0.5000 0.2706 0.5000 0.2706 -0.5000 -0.6533 0.5000 -0.2706 -0.5000 0.6533 r = 0.5000 0.6533 0.5000 0.2706 0.5000 0.2706 -0.5000 -0.6533 0.5000 -0.2706 -0.5000 0.6533 0.5000 -0.6533 0.5000 -0.2706 r = 1.0000 0.0000 -0.0000 -0.0000 r = 1.0000 0.0000 -0.0000 -0.0000 0 1.0000 0.0000 0.0000 r = 1.0000 0.0000 -0.0000 -0.0000 0 1.0000 0.0000 0.0000 -0.0000 0.0000 1.0000 0.0000 r = 1.0000 0.0000 -0.0000 -0.0000 0 1.0000 0.0000 0.0000 -0.0000 0.0000 1.0000 0.0000 -0.0000 0.0000 0.0000 1.0000

2   Pass
x = 10; y = mydct(mydct(x)); y_corr = 10; assert( norm( y_corr(:) - y(:)) < 1e-10 );

r = 10 r = 10

3   Pass
x = [1 0]; y = mydct(x); y_corr = sqrt(2)/2*[1;1]; assert( norm( y_corr(:) - y(:)) < 1e-10 );

r = 0.7071 0.7071