# How to subtract coloumn vectors of a cell array

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Levente Gellért on 26 Sep 2021
Answered: Stephen23 on 26 Sep 2021
Dear Community,
I have a cell array, with each cell containing n by m matrix. I would like to use cellfun and minus, and subtract the first coloumn from the second one, and add the value of 1. (like: result=(second coloumn-first coloumn)+1)
Unfortunately I do not exacty understand the nature of cellfun, to solve this.
Please find attached an example cell, and a result.mat showing, what would I like to get, when perform the calculation in the first cell.
Many thanks for you suggestions!
lg

Stephen23 on 26 Sep 2021
inp = load('mycell.mat').mycell; % input data
fun = @(m) 1+diff(m,1,2); % anonymous function
out = cellfun(fun,inp, 'uni',0) % calculate
out = 12×1 cell array
{100×1 double} {100×1 double} {100×1 double} { 20×1 double} { 20×1 double} { 20×1 double} {124×1 double} {124×1 double} {124×1 double} {101×1 double} {101×1 double} {101×1 double}
out{1} % compare first cell against expected output
ans = 100×1
10 23 34 17 13 3 512 4 10 37
ans = 100×1
10 23 34 17 13 3 512 4 10 37