find most frequent characters in a string

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Alex
Alex il 13 Dic 2011
I have a string and I want to find the most frequent characters that appear in it. Is there anyway to do this with matlab?

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Walter Roberson
Walter Roberson il 13 Dic 2011
mode()
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David Young
David Young il 13 Dic 2011
char(mode(double(str)))
Walter Roberson
Walter Roberson il 13 Dic 2011
David's code is fine. It could also be written more concisely as
char(mode(0+str))

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David Young
David Young il 13 Dic 2011
One way to get the commonest n characters, in descending order of frequency:
>> str = 'hello world';
>> n = 5; % number of characters to report
>> [~, c] = sort(hist(double(str), 0:255), 'descend');
>> f = char(c(1:n)-1)
f =
lo de
There may well be numerous better ways.

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