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Result of strfind

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Mtlb Usr
Mtlb Usr 2011-2-7
Hi,
I'm using strfind function and I want to check the result of this function. However, when strfind doesn't find the string that I indicated and the result is {[]}, instead of the position value. I have tested the result of strfind with strcmp and == or ~= but I can't control the value.
How can I know whether value of strfind is {[]}?
Regards

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采纳的回答

Paulo Silva
Paulo Silva 2011-2-7
a={[]}
isempty(a{:}) %1 if a is empty, 0 otherwise
another option
numel(a{:}) %0 if a is empty, it returns the number of elements of a
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Paulo Silva
Paulo Silva 2011-2-7
thanks for pointing that out
Mtlb Usr
Mtlb Usr 2011-2-7
Hi Paulo,
I solved the issue, with your answer.
Thank you
regards

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更多回答（1 个）

Oleg Komarov
Oleg Komarov 2011-2-7
I'll show an example:
% Example input
c = {'fine';'How are you'};
out = strfind(c,'fine')
out =
[1]
[]
% Return the index with exmpty cells
idxEmpty = cellfun('isempty',out)
idxEmpty =
0
1
% Positions on non empty results
posNonEmpty = find(~idxEmpty)
posNonEmpty =
1
% Extract non empty
c(~idxEmpty) % or c(posNonEmpty)
ans =
'fine'
Oleg

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