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isletter

Array elements that are alphabetic letters

Syntax

tf = isletter('str')

Description

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.

Examples

Find the letters in character array s.

s = 'A1,B2,C3';

isletter(s)
ans =
     1     0     0     1     0     0     1     0

Introduced before R2006a

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