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Re: Matching 2 lists [message #72220 is a reply to message #72219]

Sat, 21 August 2010 09:37

David Baker
Messages: 6
Registered: August 2010

Junior Member

On Aug 21, 4:35 pm, David Baker <de...@le.ac.uk> wrote:
> On Aug 21, 4:28 pm, Gray <grayliketheco...@gmail.com> wrote:
>
>
>
>> On Aug 21, 11:16 am, David Baker <de...@le.ac.uk> wrote:
>
>>> On Aug 21, 4:11 pm, David Baker <de...@le.ac.uk> wrote:
>
>>>> Hi there,
>>>> I'm wondering if someone can help me. I'm trying to match
>>>> two lists of stars together. Where I differ from the standard 1-1
>>>> match that match_2d.pro does so well is that I would like to be able
>>>> to compute a 1-many match. I.e find any star in list B that is a
>>>> possible match to a single star in list A not just the closest.
>
>>>> Many thanks for any help that someone can provide
>
>>>> David
>
>>> -oh and just in case, the coordinates are just x and y pixel
>>> coordinates not ra and dec. It's just simple euclidean distance that
>>> I'm using to set the search radius
>
>> If you're using IDL 8.0, you could modify match_2d to return a list of
>> length n_a, where each element is an array of indices into b.
>
> Thanks for the advice, whilst I maybe comfortable programming basic
> stuff I can't even begin to follow the match_2d code so wouldn't know
> where exactly to code in what you suggest. But that is exactly what
> I'm after.
>
> -Cheers,
> David

You mentioned using IDL 8.0. My university is currently still on
7.1.1, is there anything unique about IDL 8.0 to the solution you
propose?

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[Message index]

		Re: Matching 2 lists By: David Baker on Sun, 22 August 2010 00:06
		Re: Matching 2 lists By: Jeremy Bailin on Sat, 21 August 2010 12:48
		Re: Matching 2 lists By: David Baker on Sat, 21 August 2010 10:03
		Re: Matching 2 lists By: penteado on Sat, 21 August 2010 09:52
		Re: Matching 2 lists By: David Baker on Sat, 21 August 2010 09:37
		Re: Matching 2 lists By: David Baker on Sat, 21 August 2010 08:35
		Re: Matching 2 lists By: Gray on Sat, 21 August 2010 08:28
		Re: Matching 2 lists By: David Baker on Sat, 21 August 2010 08:16
		Re: Matching 2 lists By: Jeremy Bailin on Thu, 26 August 2010 07:10

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