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Contents

Index

• Getting Started

• User's Guide

• Desktop Tools and Development Environment

• Data Import and Export

• Mathematics

• Data Analysis

• Programming and Data Types

• Data Type Conversion

• Operators and Special Characters

• Description of Strings in MATLAB

• String Creation

• String Identification

• String Manipulation

• String Parsing

• String Evaluation

• String Comparison

• Bit-Wise Operations

• Logical Operations

• Relational Operations

• Set Operations

• Date and Time Operations

• Programming in MATLAB

• Object-Oriented Programming

• 3-D Visualization

• GUI Development

• External Interfaces

• Release Notes

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

See Also

char | is* | isa | iscellstr | ischar | isnumeric | isspace | isstrprop | strings

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