LAPACK 3.11.0 LAPACK: Linear Algebra PACKage
Searching...
No Matches
disnan.f
Go to the documentation of this file.
1*> \brief \b DISNAN tests input for NaN.
2*
3* =========== DOCUMENTATION ===========
4*
5* Online html documentation available at
6* http://www.netlib.org/lapack/explore-html/
7*
8*> \htmlonly
10*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/disnan.f">
11*> [TGZ]</a>
12*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/disnan.f">
13*> [ZIP]</a>
14*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/disnan.f">
15*> [TXT]</a>
16*> \endhtmlonly
17*
18* Definition:
19* ===========
20*
21* LOGICAL FUNCTION DISNAN( DIN )
22*
23* .. Scalar Arguments ..
24* DOUBLE PRECISION, INTENT(IN) :: DIN
25* ..
26*
27*
28*> \par Purpose:
29* =============
30*>
31*> \verbatim
32*>
33*> DISNAN returns .TRUE. if its argument is NaN, and .FALSE.
34*> otherwise. To be replaced by the Fortran 2003 intrinsic in the
35*> future.
36*> \endverbatim
37*
38* Arguments:
39* ==========
40*
41*> \param[in] DIN
42*> \verbatim
43*> DIN is DOUBLE PRECISION
44*> Input to test for NaN.
45*> \endverbatim
46*
47* Authors:
48* ========
49*
50*> \author Univ. of Tennessee
51*> \author Univ. of California Berkeley
52*> \author Univ. of Colorado Denver
53*> \author NAG Ltd.
54*
55*> \ingroup OTHERauxiliary
56*
57* =====================================================================
58 LOGICAL FUNCTION disnan( DIN )
59*
60* -- LAPACK auxiliary routine --
61* -- LAPACK is a software package provided by Univ. of Tennessee, --
62* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
63*
64* .. Scalar Arguments ..
65 DOUBLE PRECISION, INTENT(IN) :: din
66* ..
67*
68* =====================================================================
69*
70* .. External Functions ..
71 LOGICAL dlaisnan
72 EXTERNAL dlaisnan
73* ..
74* .. Executable Statements ..
75 disnan = dlaisnan(din,din)
76 RETURN
77 END
logical function disnan(DIN)
DISNAN tests input for NaN.
Definition: disnan.f:59
logical function dlaisnan(DIN1, DIN2)
DLAISNAN tests input for NaN by comparing two arguments for inequality.
Definition: dlaisnan.f:74