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Re: match_2d [message #66209 is a reply to message #66207]

Tue, 21 April 2009 08:47

Jeremy Bailin
Messages: 618
Registered: April 2008

Senior Member

On Apr 20, 9:40 am, vino <astrocr...@gmail.com> wrote:
> Hello everyone,
>
> I am using match_2d from J.D.Smith's library (http://
> tir.astro.utoledo.edu/idl/match_2d.pro) to match between two
> catalogues. Below is what i am doing :
>
> IDL> print,star_radec1
> 242.759 -29.4162
> 252.666 -31.6364
> 250.523 -30.5292
> 244.782 -20.2181
> IDL> print,star_radec2
> 252.666 -31.6364
> 250.523 -30.5292
> 267.782 -22.9120
> IDL> match=match_2d(star_radec1(0,*),star_radec1(1,*),star_radec2
> (0,*),star_radec2(1,*),.02,MATCH_DISTANCE=md)
> IDL> print,match
> -1 -1 -1 -1
> IDL> print,md
> 5.98943e-22 3.62562 2.23579e-17 2.62037e-22
>
> Eventhough there are 3 objects matching, why is it that match_2d is
> not finding them?? I shall be very grateful for any pointers...
>
> Thanks and regards,
>
> Vino

It looks like MATCH_2D requires that its inputs be flat vectors, but
instead you're feeding it [1,N] arrays.

-Jeremy.

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[Message index]

		Re: match_2d By: vino on Thu, 23 April 2009 05:10
		Re: match_2d By: JDS on Wed, 22 April 2009 15:39
		Re: match_2d By: Jeremy Bailin on Wed, 22 April 2009 10:22
		Re: match_2d By: vino on Tue, 21 April 2009 09:23
		Re: match_2d By: Jeremy Bailin on Tue, 21 April 2009 08:47
		Re: match_2d By: Jeremy Bailin on Fri, 24 April 2009 10:50

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