Contents of Example

Example

> isnan(nan())
        1
> isnan(-nan())
        1
> isnan(inf())
        0
> isnan(0)
        0
> isnan(1)
        0
> a = [nan(),3,2,nan(),-nan()+2,45]
 a =
 matrix columns 1 thru 6
      NaN          3          2        NaN       -NaN         45  

> isnan(a)
 matrix columns 1 thru 6
        1          0          0          1          1          0

See also: Page $[*]$ finite(), Page $[*]$ isinf(), Page $[*]$ nan().