comp.lang.idl-pvwave archive: archive » Re: where() and IEEE NaN

Home » Public Forums » archive » Re: where() and IEEE NaN

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: where() and IEEE NaN [message #17815 is a reply to message #17813]

Fri, 05 November 1999 00:00

badastro
Messages: 7
Registered: August 1998

Junior Member

In article <7vv1j3$6ro$1@ra.nrl.navy.mil>,
Todd Bowers <tbowers@nrlssc.navy.mil> wrote:
>IDL> a = [1,2,!Values.F_NaN,4,!Values.F_NaN]
>IDL> print, a
> 1.00000 2.00000 NaN 4.00000 NaN
>IDL> print, where(a EQ !Values.F_NaN)
> 0 1 2 3 4
>
>Hmmmmmm.... is this a known feature? The where() help says
>nothin' about NaN's.
>IDL v5.2a

Incidentally, if you are looking for the element numbers
of where a = NaN, try:

IDL> print,where(a-a ne 0)
2 4

;-)

* * * * * The Bad Astronomer * * * *

Phil Plait badastro@badastronomy.com
The Bad Astronomy Web Page: http://www.badastronomy.com

Report message to a moderator

[Message index]

		Re: where() and IEEE NaN By: korpela on Mon, 08 November 1999 00:00
		Re: where() and IEEE NaN By: badastro on Mon, 08 November 1999 00:00
		Re: where() and IEEE NaN By: Pavel Romashkin on Mon, 08 November 1999 00:00
		Re: where() and IEEE NaN By: thompson on Mon, 08 November 1999 00:00
		Re: where() and IEEE NaN By: jsb on Thu, 11 November 1999 00:00
		Re: where() and IEEE NaN By: korpela on Sat, 06 November 1999 00:00
		Re: where() and IEEE NaN By: Vincenzo Andretta on Sat, 06 November 1999 00:00
		Re: where() and IEEE NaN By: davidf on Fri, 05 November 1999 00:00
		Re: where() and IEEE NaN By: davidf on Fri, 05 November 1999 00:00
		Re: where() and IEEE NaN By: Pavel Romashkin on Fri, 05 November 1999 00:00
		Re: where() and IEEE NaN By: thompson on Fri, 05 November 1999 00:00
		Re: where() and IEEE NaN By: T Bowers on Fri, 05 November 1999 00:00
		Re: where() and IEEE NaN By: badastro on Fri, 05 November 1999 00:00
		Re: where() and IEEE NaN By: davidf on Fri, 05 November 1999 00:00
		Re: where() and IEEE NaN By: korpela on Fri, 05 November 1999 00:00

Previous Topic:	Re: Center of mass???
Next Topic:	Re: contour plots on walls of a cube

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Wed Oct 08 19:02:07 PDT 2025

Total time taken to generate the page: 0.00397 seconds