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how to count repeated character in string ??

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ahmed
ahmed 2014-3-29
回答： Hassaan 2023-12-22
string loke this aaaaddccccfeeee how to count the repeating of character (a) a=3

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采纳的回答

Azzi Abdelmalek
Azzi Abdelmalek 2014-3-29
编辑：Azzi Abdelmalek 2014-3-29
str='aaaaddccccfeeee'
[ii,jj,kk]=unique(str)
freq=histc(kk,1:numel(ii))
c=regexp(ii,'.','match')'
out=[c num2cell(freq)]

更多回答（2 个）

Jan
Jan 2014-3-29
With http://www.mathworks.com/matlabcentral/fileexchange/41813-runlength:
str = 'aaaaddccccfeeee';
[b, n] = RunLength(str)
Hassaan
Hassaan 2023-12-22
To count the occurrences of a specific character in a string in MATLAB, you can use the count function.
str = 'aaaaaddddccceeeeee'; % The string to search
characterToCount = 'a'; % The character you want to count
% Count the occurrences
occurrences = count(str, characterToCount);
% Display the result
fprintf('The character "%s" appears %d times in the string.\n', characterToCount, occurrences);
Output
The character "a" appears 5 times in the string

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