MATLAB: Zero pad vectors within cell array to make them equal length

cell arrayMATLABSignal Processing Toolboxvectorszero-pad

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));
Now, I need to zero pad the shorter vectors with the differrence from maxsmaples and their own sample numbers.
I tried the following first:
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
It gave me the follwing error:
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?

Best Answer

I do not know what the dimensions of ‘sigvecarray’ are, however I assume they are all column vectors.
If so, replace the (,) with a (;) here, and it should work (unless there are also other problems): 
signalvectors{k} = [sigvecarray{k}; zeros(padding, 1)]
EDIT — (9 Oct 2020 at 12:34)
All of these — including this: 
padfun = @(k) [sigvecarray{k} zeros(maxsamples(k) - origsamplesarray(k), 1)] ;
function — are concatenating something with a column vector, that column vector being defined as: 
zeros(maxsamples(k) - origsamplesarray(k), 1)
If ‘sigvecarray{k}’ is a row vector or even another column vector of a different length, that error will be thrown, since (,) is a horizontal concatenation operator.
If ‘sigvecarray{k}’ is a column vector (and that is still unknown), concatenate them vertically — not horizontally — using the (;) vertical concatenation operator: 
padfun = @(k) [sigvecarray{k}; zeros(maxsamples(k) - origsamplesarray(k), 1)] ;
                             ↑ ← VERTICAL CONCATENATION OPERATOR
.
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