lapack-isnan - Man Page

logical function disnan (din)
DISNAN tests input for NaN.
logical function sisnan (sin)
SISNAN tests input for NaN.

DISNAN tests input for NaN.  

Purpose:

 DISNAN returns .TRUE. if its argument is NaN, and .FALSE.
 otherwise.  To be replaced by the Fortran 2003 intrinsic in the
 future.

Parameters

DIN

          DIN is DOUBLE PRECISION
          Input to test for NaN.

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line 58 of file disnan.f.

SISNAN tests input for NaN.  

Purpose:

 SISNAN returns .TRUE. if its argument is NaN, and .FALSE.
 otherwise.  To be replaced by the Fortran 2003 intrinsic in the
 future.

Parameters

SIN

          SIN is REAL
          Input to test for NaN.

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line 58 of file sisnan.f.