What are the dependencies for findpeaks.m

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vsee
vsee 2011-8-31
编辑： Joshua Baldwin 2017-12-18
Do I need signal processign toolbox to use the findpeaks function?

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Paulo Silva
Paulo Silva 2011-8-31
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
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Paulo Silva
Paulo Silva 2011-8-31
yes if by workspace you mean current directory
Walter Roberson
Walter Roberson 2011-8-31
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.

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Joshua Baldwin
Joshua Baldwin 2017-12-18
编辑：Joshua Baldwin 2017-12-18
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

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