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isinf

Array elements that are infinite

Syntax

TF = isinf(A)

Description

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

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

Examples

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Determine the infinite elements of the row vector, A.

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

   -0.5000   -1.0000       Inf    1.0000    0.5000

TF = isinf(A)
TF =

  1×5 logical array

   0   0   1   0   0

More About

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Tall Array Support

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

See Also

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Introduced before R2006a

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