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JBIU update (and testimonial)
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Jeremy Bailin  
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 More options Mar 12 2011, 10:21 pm
Newsgroups: comp.lang.idl-pvwave
From: Jeremy Bailin <astroco...@gmail.com>
Date: Sat, 12 Mar 2011 19:21:35 -0800 (PST)
Local: Sat, Mar 12 2011 10:21 pm
Subject: JBIU update (and testimonial)
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I've made a few updates to JBIU, which can be found in the usual place:

http://web.astroconst.org/jbiu

The biggest change is that all of the plotting routines now use Coyote Graphics (and accept /WINDOW and /ADDCMD keywords). There's also a new routine UNIQIFY that returns the unique elements of an array (for when you get sick of typing foo[foo_sorted[uniq(foo[foo_sorted])]]), and SPLINEOPLOT has been rename SPLINEPLOT and modified slightly.

I also thought that you might be entertained by what my boss had to say about MATCH_SPH, once I finally got him to try it out:

"Holy shit!  I cannot believe how much faster that is than srcor.  I kept on
putting off reading it in...  But I needed to x-correlate 300Kx300K, and it
was going to take me days (literally).  your routine did it in 5 seconds."

-Jeremy.


 
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wlandsman  
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 More options Mar 12 2011, 11:30 pm
Newsgroups: comp.lang.idl-pvwave
From: wlandsman <wlands...@gmail.com>
Date: Sat, 12 Mar 2011 20:30:14 -0800 (PST)
Local: Sat, Mar 12 2011 11:30 pm
Subject: Re: JBIU update (and testimonial)
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On Saturday, March 12, 2011 10:21:35 PM UTC-5, Jeremy Bailin wrote:
> I also thought that you might be entertained by what my boss had to say about MATCH_SPH, once I finally got him to try it out:

> "Holy shit!  I cannot believe how much faster that is than srcor.  I kept on
> putting off reading it in...  But I needed to x-correlate 300Kx300K, and it
> was going to take me days (literally).  your routine did it in 5 seconds."

To be fair , he was most likely using a pre-March 2009 version of srcor.pro in the Astron library, which is when it was updated to dramatically improve the speed for  spherical matching.

On the other hand, I was just informed about a bug in srcor.pro when the sources are spread over more than half the sky, so maybe it was better to be using a different routine.    I'll have an update to srcor.pro soon.  --Wayne


 
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Jeremy Bailin  
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 More options Mar 13 2011, 12:09 am
Newsgroups: comp.lang.idl-pvwave
From: Jeremy Bailin <astroco...@gmail.com>
Date: Sat, 12 Mar 2011 21:09:49 -0800 (PST)
Local: Sun, Mar 13 2011 12:09 am
Subject: Re: JBIU update (and testimonial)
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On Saturday, March 12, 2011 11:30:14 PM UTC-5, wlandsman wrote:
> On Saturday, March 12, 2011 10:21:35 PM UTC-5, Jeremy Bailin wrote:

> > I also thought that you might be entertained by what my boss had to say about MATCH_SPH, once I finally got him to try it out:

> > "Holy shit!  I cannot believe how much faster that is than srcor.  I kept on
> > putting off reading it in...  But I needed to x-correlate 300Kx300K, and it
> > was going to take me days (literally).  your routine did it in 5 seconds."

> To be fair , he was most likely using a pre-March 2009 version of srcor.pro in the Astron library, which is when it was updated to dramatically improve the speed for  spherical matching.

Yeah, probably - I was surprised when he said it was almost 4 orders of magnitude faster, since it was more like a factor of 60-70 in my tests.

-Jeremy.


 
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