repeated characters in string

Hi there, I want to delete any character which repeated more than 3 in string I have this code which delete all repatriation Input = {'CEEEGH';'CCEEG';'ABCDEFF';'BCFGG';'BCDEEG';'BEFFH';'AACEGH'}

cellfun(@unique,Input,'UniformOutput',0)

[James Tursa]

Delete characters that repeat more than 3 times total, or more than 3 times in a row?

[Jos (10584)]

What is the output supposed to look like?

Answer 1

[Gautam Mohan]

Hi Ebtesam,

If you want to delete any character which is repeated three or more times in a row, you can substitute the @unique function in your cellfun() with a regexp that searches for 3+ character matches and replaces them with nothing:

f = @(s) regexprep(s, '(\S)\1\1+', '');
cellfun(f,Input,'UniformOutput',0)

If you need to eliminate characters that occur 3 or more times throughout the whole string, I would recommend writing a separate function that accomplishes that goal and then applying it to each string using cellfun().

Hope this helps!