use sprintf with .wav files in for-loop

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harrie houthakker
harrie houthakker 2018-5-10
评论： Jan 2018-5-10
Hi,
How do i properly recall a .wav file in a for-loop? Changing the name of the variable with sprintf gives me an error.
[wav1,Fs] = audioread('wav1.wav');
[wav2,Fs] = audioread('wav2.wav');
[wav3,Fs] = audioread('wav3.wav');
n = 3;
for k = 1:n
wavx = sprintf('wav%d', k);
[acor,lag] = xcorr(wav1,wavx);
end
I hope someone can help me, thanks a lot in advance!
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harrie houthakker
harrie houthakker 2018-5-10
allright, unfortunately they do not have the same amount of samples. But if so, (maybe with zeropadding), would that be any useful when my goal is to align them with xcorr? thanks
Von Duesenberg
Von Duesenberg 2018-5-10
编辑：Von Duesenberg 2018-5-10
In this case you may want to store the your signals in a cell array and then loop through your cell array. And xcorr does the padding for you.

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Von Duesenberg
Von Duesenberg 2018-5-10
编辑：Von Duesenberg 2018-5-10
Or, assuming this is for the same piece of homework as yesterday, this can help you (although I hesitate to suggest it as an answer as it does not answer your question):
myFiles = uigetfile('*.wav', 'MultiSelect', 'on');
mySignals = cell(length(myFiles),1);
for iFile = 1:length(myFiles)
mySignals{iFile} = audioread(char(myFiles(iFile)));
end

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Walter Roberson
Walter Roberson 2018-5-10
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harrie houthakker
harrie houthakker 2018-5-10
i came across this earlier indeed, but i find it difficult to find a better solution for my problem. Because my goal is to align the .wav files with xcorr.
Jan
Jan 2018-5-10
@harrie: The application of xcorr is not a problem in any way, if you use a cell array. wav{1} is much better than wav1, because you can access it easily in a loop.

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