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Array elements that are finite


TF = isfinite(A)


TF = isfinite(A) returns an array the same size as A containing logical 1 (true) where the elements of the array A are finite and logical 0 (false) where they are infinite or NaN. For a complex number z, isfinite(z) returns 1 if both the real and imaginary parts of z are finite, and 0 if either the real or the imaginary part is infinite or NaN.

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


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Create a row vector, A, and determine the finite elements.

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

   -0.5000   -1.0000       Inf    1.0000    0.5000

TF = isfinite(A)
TF =

  1×5 logical array

   1   1   0   1   1

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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