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Topic: Searchnig for a string in a array
Replies: 5   Last Post: Mar 15, 2013 12:52 PM

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Bruno Luong

Posts: 9,822
Registered: 7/26/08
Re: Searchnig for a string in a array
Posted: Mar 15, 2013 12:52 PM
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% The shortest is not always the fastest

A(1:2:1e6) = {1};
A(2:2:1e6) = {'Hello World is here'};

loc = find( cellfun(@(x) ischar(x) && ~isempty(regexp(x, 'is', 'ignorecase')), A) );
toc % Elapsed time is 7.959571 seconds.

b = cellfun('isclass',A,'char');
i = find(b);
loc = i(~cellfun('isempty',strfind(lower(A(b)),'is')));
toc % 0.636606 seconds.

% Bruno

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