What are the dependencies for findpeaks.m

Do I need signal processign toolbox to use the findpeaks function?

Answer 1

[Paulo Silva]

Yes you need the signal processing toolbox for the findpeaks that comes with it.

You can do your own findpeaks function or get one from File Exchange

I recommend this one: PeakFinder

Also look at this

[vsee]

Thanks. Can I just use the function if peakfinder.m is in my workspace?

[Paulo Silva]

yes if by workspace you mean current directory

[Walter Roberson]

You do not place functions in a workspace: you place them in a directory. If you place peakfinder.m in any of the directories that are on your MATLAB path, then it will be found.

Answer 2

[Joshua Baldwin]

As noted earlier, the Signal Processing Toolbox is needed. However, I only needed to process a fairly small and basic array of doubles that could be easily iterated through, so I worked around this by writing my own function as follows:

function [pks, locs] = findpeaks(data)
    pks  = zeros(numel(data), 1);
    locs = zeros(numel(data), 1);
    count = 0;
    for i = 2:(numel(data) - 1)
        if (data(i - 1) < data(i)) && (data(i) > data(i + 1))
            count = count + 1;
            pks(count)  = data(i);
            locs(count) = i;
        end
    end
    pks  = pks(1:count);
    locs = locs(1:count);
end