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arrange file length matlab

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sam aldoss
sam aldoss 2018-10-17
评论： sam aldoss 2018-10-17
hello everyone
I got some files that has a length 20000 cell and the others are shorter then 20000 . I want to make these short files to complete the set of cell 20000 with replacing the missing with ones or zeros .
and am using this code to read the files
for k = 1:numfiles
myfilenames = sprintf('a%d.wav', k);
[mydata{k}, myfs{k}] = audioread(myfilenames,[1,2000]);
end
  1 个评论
Jan
Jan 2018-10-17
What is the purpose of "[1, 2'000]"? You mention "20'000" also. Is this a typo? What does "cell" mean? Remember that cell is a specific type of array in Matlab. Replacing with "ones or zeros" - please decide this by your own. What does "make these files to complete" mean? Do you want to create files with a standard length or does the question concern the arrays in Matlab only?

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采纳的回答

Jan
Jan 2018-10-17
编辑：Jan 2018-10-17
Maybe:
for k = 1:numfiles
File = sprintf('a%d.wav', k);
[signal, myfs{k}] = audioread(File);
if size(signal, 1) < 20000 % Pad signal with zeros
signal(20000, :) = 0;
end
mydata{k} = signal;
end
Usually "data" is a sufficient name already, while "mydata" is a tiny overkill - of course these are your data ;-) Especially "myfilenames" is confusing to specify one file.

更多回答（1 个）

KSSV
KSSV 2018-10-17
A{1} = rand(50,1) ;
A{2} = rand(40,1) ;
A{3} = rand(60,1) ;
L = max(cellfun(@length,A)) ; % get maximum length
iwant = cell(size(A)) ;
for i = 1:length(A)
iwant {i} = zeros(L,1) ;
iwant{i}(1:length(A{i})) = A{i};
end
  4 个评论
显示 2更早的评论
Jan
Jan 2018-10-17
@sam aldoss: "does not work" is a weak description of the occurring problem. Please share all information you have to make it as easy as possible to help you. The need to guess the details is not useful. Thanks.
Jan
Jan 2018-10-17
@KSSV: cellfun('length', C) is more efficient than cellfun(@length, C).

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