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isletter

Determining if an array has letter characters

isletter(A)

  • A is an array of any data type (e.g., logical, numeric, or character).
  • The output is an array of logical values, which are equal to logical 1 if the corresponding entry in A is a letter (i.e., a - z, or A - Z), and logical 0 if otherwise.
  • If A is empty, it returns an empty array.