How can convert vector aa size 1x262144 to matrix 256x256

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hi every one i'm new her i need help
size of aa 1x262144 i want convert to matrix 256x256
  4 个评论
honey
honey 2020-1-6
编辑:honey 2020-1-6
[y,fs]=audioread("filename");
disp(fs)
but the above didn't print the sampeled values
if there are anotherways for this plzz describe
along with these why we choose 1*262144 as size. is there any reason for it
Walter Roberson
Walter Roberson 2020-1-6
In your posted code, fs would be the sampling frequency. The sampled values would be in y. You would proceed to fft(y) and then analyze the results along the lines I mentioned.
Note: your y might have multiple channels, which will show up as separate columns. Be careful, as in theory the different channels can have different peak frequencies.

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采纳的回答

Isabella Osetinsky-Tzidaki
编辑:Isabella Osetinsky-Tzidaki 2016-12-11
% you will not convert (262144 is 4 times 256*256 and not equal to it)
% but complete 4 matrices out of your "aa" vector
% and you will get a "M" array:
L=256*256;
M=nan(256,256,4); % pre-allocate
for i=1:4
v=aa(L*(i-1)+1:L*i);
M(:,:,i)=reshape(v,256,256);
end
  37 个评论
Walter Roberson
Walter Roberson 2020-3-16
can u please explain in this code why is it necessary to use both DCT and DWT
You should be asking the author of the code questions like that.
why only HAAR in DWT
'haar' has good time localization, able to deal with sudden changes in value, which makes it more suitable for use in audio.

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更多回答(1 个)

the cyclist
the cyclist 2016-12-11
Use the reshape command.

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