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>---------------------------------------------------------------------------
> exa080901_dct1_test, for exa8.9.1
> to call function exa080901_dct1;
>---------------------------------------------------------------------------
clear
> ¶ÔһάÐźÅ×÷DCT£»
for k=1:9
k0=k-1;
y=exa080901_dct1(200,k0);
subplot(3,3,k)
plot(y)
end