My cell array has 861 rows and each row has vectors of varying sizes. I want to calculate std dev only for cells that have 20 elements. Others should give a value of 0. How do I tell cellfun to get only the cells with 20 elements. Here is my attempt

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Stds=cellfun(@std ,ratios,'UniformOutput',false); % trying to calculate standard dev for cells for cell array 'ratios' that have 20 elements. All other cells should give 0.

Accepted Answer

the cyclist
the cyclist on 22 May 2018
Edited: the cyclist on 22 May 2018
ratios = {rand(19,1); rand(20,1); rand(21,1)}

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