how to count repeated character in string ??

string loke this aaaaddccccfeeee how to count the repeating of character (a) a=3

Answer 1

[Azzi Abdelmalek]

str='aaaaddccccfeeee'
[ii,jj,kk]=unique(str)
freq=histc(kk,1:numel(ii))
c=regexp(ii,'.','match')'
out=[c num2cell(freq)]

[ahmed]

alot of thanks thanks for your help

Answer 2

[Jan]

With http://www.mathworks.com/matlabcentral/fileexchange/41813-runlength:

str = 'aaaaddccccfeeee';
[b, n] = RunLength(str)

Answer 3

[Hassaan]

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