Documentation

This is machine translation

Translated by Microsoft
Mouse over text to see original. Click the button below to return to the English verison of the page.

isnan

Array elements that are NaN

Syntax

TF = isnan(A)

Description

TF = isnan(A) returns an array the same size as A containing logical 1 (true) where the elements of A are NaNs and logical 0 (false) where they are not. For a complex number z, isnan(z) returns 1 if either the real or imaginary part of z is NaN, and 0 if both the real and imaginary parts are finite or Inf.

For any real A, exactly one of the three quantities isfinite(A), isinf(A), and isnan(A) is equal to one.

Examples

collapse all

Determine the NaN elements of the row vector, A.

A = 0./[-2 -1 0 1 2]
A =

     0     0   NaN     0     0

TF = isnan(A)
TF =

  1×5 logical array

   0   0   1   0   0

More About

collapse all

Tall Array Support

This function fully supports tall arrays. For more information, see Tall Arrays.

See Also

| | |

Introduced before R2006a

Was this topic helpful?