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find most frequent characters in a string

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Alex
Alex el 13 de Dic. de 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?

Respuesta aceptada

Walter Roberson
Walter Roberson el 13 de Dic. de 2011
mode()
  3 comentarios
David Young
David Young el 13 de Dic. de 2011
char(mode(double(str)))
Walter Roberson
Walter Roberson el 13 de Dic. de 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 el 13 de Dic. de 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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