How to save output from the for loop in a matrixs?

Question

Hi i have a  matrix with M x n dimension. I have performed the peak analysis for each column in the for loop. I want to save the output for the for loop as a matrix.   I have used the following for loop.   for i=x [pks,locs]=findpeaks((i),'MinPeakHeight',Thresold) end I get output like this :

Kshitij Singh · Accepted Answer

You can't pass (i) into findpeaks() - that's just a loop iterator, not a signal. You need to extract the column from your matrix. Then, since each column is not guaranteed to have the same number of peaks, you'll need a cell array to store the results.
 
 
[rows, columns] = size(data) % Size of your 2-D matrix of signals.
allPeakValues = cell(1, columns);
allPeakIndexes = cell(1, columns);
for col = 1 : columns
    % Extract one column from the matrix.
    thisColumn = data(:, col);
    % Find the peaks in that column.
    [thesePeakValues, theseIndexesOfPeaks] = findpeaks(thisColumn, 'MinPeakHeight', Threshold);
    % Save the peaks for this particular column in our cell array that
    % holds results for all the columns.
    allPeakValues{col} = thesePeakValues;
    allPeakIndexes{col} = theseIndexesOfPeaks;
end

How to save output from the for loop in a matrixs?

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