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Array elements that are alphabetic letters


tf = isletter('str')


tf = isletter('str') returns an array the same size as str containing logical 1 (true) where the elements of str are letters of the alphabet and logical 0 (false) where they are not.


Find the letters in character array s.

s = 'A1,B2,C3';

ans =
     1     0     0     1     0     0     1     0

Introduced before R2006a

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