Yisroel asked . 2020-12-28

Zero pad vectors within cell array to make them equal length

I have a cell array with vectors y1, y2, y3, y4, y5 which are of variable lengths. I get the maximum length among all elements in the cell array using:

sigvecarray = {y1, y2, y3, y4, y5};
[maxsamples, idx] = max(cellfun(@numel, sigvecarray));

signalvectors = {}
for k = 1:numel(sigvecarray)
    currveclength = length(sigvecarray{k})
    if currveclength < maxsamples
        padding = samples - currveclength
        signalvectors{k} = [sigvecarray{k}, zeros(padding, 1)]
    end
end

Error using horzcat
Dimensions of matrices being concatenated are not consistent.

Then I tried the solution from the post here as follows:

origsamplesarray = cellfun(@numel, sigvecarray);
padfun = @(k) [sigvecarray{k} zeros(maxsamples(k) - origsamplesarray(k), 1)] ;
signalvectors = arrayfun(padfun, 1:numel(sigvecarray) , 'un', 0);

It gave me the following error:

Error using horzcat
Dimensions of matrices being concatenated are not consistent.

Error in xcorr>@(k)[sigvecarray{k},zeros(maxsamples(k)-origsamplesarray(k),1)]

What am I possibly doing wrong above?

matlab , cell array , matrix