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Re: Where [message #63084 is a reply to message #63078]

Tue, 28 October 2008 10:28

Brian Larsen
Messages: 270
Registered: June 2006

Senior Member

On Oct 28, 5:48 am, silviad...@gmail.com wrote:
> Hallo!
> Why IDL returns -1 when i do:
> where(array eq 0.785)?
> Array elements are not zero!
> Thank you!

This is the as advertised behavior, -1 is the index that matches your
query (meaning none match)

Try this for some insight
a=findgen(10)
ind=where(a eq 2.4, n_ind)
print, a, ind

and you get -1, 0. Meaning no elements in a are equal to 2.4 since
they are 0,1,2,3,4,5,6,7,8,9.

Make sense?

Cheers,

Brian

------------------------------------------------------------ --------------
Brian Larsen
Boston University
Center for Space Physics
http://people.bu.edu/balarsen/Home/IDL

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[Message index]

		Where the heck is the IDL Virtual Machine? By: David Fanning on Tue, 28 October 2008 12:29
		Re: Where By: Brian Larsen on Tue, 28 October 2008 10:28
		Re: Where By: David Fanning on Tue, 28 October 2008 05:35
		Re: Where By: Carsten Lechte on Tue, 28 October 2008 03:12

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