isnan

Determine if an array has entries equal to NaN

Usage

isnan(A)

• It returns an array in which an element is equal to logical 1 if the corresponding element in A is NaN, and logical 0 if otherwise.
• A complex number is NaN if the real or imaginary part is NaN.
• The output has the same size as A.
• It returns an empty array if A is empty.