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How to find columns by name in a cell aray

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012786534
012786534 on 11 Apr 2017
Commented: 012786534 on 11 Apr 2017
Hello all,
Let's say I have a large cell array with similar variable names in the first row (A_F1 , B_F2 , A_F2 , G_F5 ...) followed by data.
I want to create a smaller cell array with just the columns where the variable name starts with A.
How would I do that?
Thank you

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Accepted Answer

Stephen Cobeldick
Stephen Cobeldick on 11 Apr 2017
Edited: Stephen Cobeldick on 11 Apr 2017
This is easy with strncmp:
>> inp = {'A_F1','B_F2','A_F2','G_F5';1,2,3,4}; % demo matrix.
>> idx = strncmp(inp(1,:),'A',1); % indices of strings starting with A.
>> otp = inp(:,idx); % select those columns from inp.
As an alternative you could use the table class, and this task may well be easier.

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