MATLAB Function Reference

isvarname

Determine if input is valid variable name

Syntax

• tf = isvarname('str')
  isvarname str
  

Description

tf = isvarname 'str' returns logical 1 (true) if the string str is a valid MATLAB variable name and logical 0 (false) otherwise. A valid variable name is a character string of letters, digits, and underscores, totaling not more than namelengthmax characters and beginning with a letter.

isvarname str uses the MATLAB command format.

Examples

This variable name is valid:

• isvarname foo
  ans = 
     1
  

This one is not because it starts with a number:

• isvarname 8th_column
  ans =
     0
  

If you are building strings from various pieces, place the construction in parentheses.

• d = date;
  
  isvarname(['Monday_', d(1:2)])
  ans = 
     1
  

See Also

genvarname, isglobal, iskeyword, namelengthmax, is*

isvalid (timer)

isvector

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