Problem 930. 1D DCT-II transform.

Solution 143048

Submitted on 27 Sep 2012 by Jean-Marie Sainthillier

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Test	Status	Code Input and Output
1	Pass	%% test 1 x = eye(4); y = mydct(mydct(x)); y_corr = eye(4); assert( norm( y_corr(:) - y(:)) < 1e-10 );
2	Pass	%% test 2 x = 10; y = mydct(mydct(x)); y_corr = 10; assert( norm( y_corr(:) - y(:)) < 1e-10 );
3	Pass	%% test 3 x = [1 0]; y = mydct(x); y_corr = sqrt(2)/2*[1;1]; assert( norm( y_corr(:) - y(:)) < 1e-10 );

Test

Status

Code Input and Output

Pass

%% test 1 x = eye(4); y = mydct(mydct(x)); y_corr = eye(4); assert( norm( y_corr(:) - y(:)) < 1e-10 );

Pass

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

Pass

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

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