Using cellfun and regexp question
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Hello,
I have a cell called storedSamplerates = 1X9;
Each cell has a string ex:
storedSamplerates{1} = 'SAMPLERATE: 50000'
storedSamplerates{2} = 'samplerate:200000'
etc.....
I am trying to remove the 'SAMPLERATE:' and 'samplerate:' portion of the cells regardless of case, so only the number is left. I can successfully use regexp with 'ignorecase', to remove this in a loop with:
sampleRates = regexp(storedSamplerates{i},'(\d+)','match','ignorecase');
So that im only left with numbers.
sampleRates{1} = '50000';
sampleRates{2} = '200000'
etc....
But I wanted to try using cellfun to have simpler code and have failed:
sampleRates(cellfun(@(x) regexp(x ,'(\d+)','match','ignorecase'),storedSamplerates));
Using cellfun and regexp seems possible,I just dont know where im messing up?
1 Comment
Stephen23
on 31 Jul 2020
Edited: Stephen23
on 31 Jul 2020
Note that because your regular expression does not match any alphabetic characters (it only matches digits) the 'ignorecase' option is completely superfluous. It does nothing, zilch, nada, zero. Get rid of it.
Also the grouping parentheses do nothing. Get rid of them.
Accepted Answer
the cyclist
on 31 Jul 2020
Edited: the cyclist
on 31 Jul 2020
I think this does what you want.
storedSamplerates{1} = 'SAMPLERATE: 50000';
storedSamplerates{2} = 'samplerate:200000';
cellfun(@(str)regexp(str,'\d*','match'),storedSamplerates)
More Answers (1)
Stephen23
on 31 Jul 2020
Edited: Stephen23
on 31 Jul 2020
The simple and efficient solution is to use the 'once' option:
sampleRates = regexp(storedSamplerates,'\d+','match','once');
% ^^^^^^^^^^^^^^^^^ entire array, no indexing!
Wrapping regexp in cellfun does much the same thing, just slower and more complex.
2 Comments
the cyclist
on 31 Jul 2020
Yes, should definitely swap to this accepting this one! The cellfun is a needless complication in my solution.
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