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Re: The best way to bin data to a grid? (may not be an IDL-specific question) [message #78737 is a reply to message #78736]

Mon, 12 December 2011 02:41

Jasdeep Anand
Messages: 16
Registered: August 2011

Junior Member

On Dec 12, 10:34 am, Fabzou <fabien.mauss...@tu-berlin.de> wrote:
>> In all seriousness though, would routines like GRIDDATA, TRIGRID, etc
>> break down for such a large input?
>
> Well, I am not very familiar with GRIDDATA but 1500000 points is not so
> large.
>
> It not difficult to find out. It mostly depends on your available
> memory, but it seems allright. IDL is just not very very fast. If you
> have to do it many times, that's maybe not the best tool for it...
>
> n = 1500000L
> lons = Scale_Vector(RANDOMU(seed, n), -180., 180)
> lats = Scale_Vector(RANDOMU(seed, n), -90., 90.)
> TRIANGULATE, lons, lats, Triangles
> data = FLTARR(n)
> out = GRIDDATA(lons, lats, data, $
> START=[0.05D,0.05D], DIMENSION=[3600,1800], DELTA=[0.1D,0.1D],$
> TRIANGLES=triangles, /NEAREST_NEIGHBOR)

Thanks Fabozu! I'm coding my own attempt that this as we speak.

I've noticed from the few examples I've seen from the web that both
TRIGRID and GRIDDATA can be used for this problem. How do both
routines differ from each other, and when should either one be used?
Again, I'm grateful for any advice you all can give me - I'm still
learning!

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[Message index]

		Re: The best way to bin data to a grid? (may not be an IDL-specific question) By: Fabzou on Tue, 13 December 2011 01:58
		Re: The best way to bin data to a grid? (may not be an IDL-specific question) By: Jasdeep Anand on Mon, 12 December 2011 05:13
		Re: The best way to bin data to a grid? (may not be an IDL-specific question) By: Fabzou on Mon, 12 December 2011 04:08
		Re: The best way to bin data to a grid? (may not be an IDL-specific question) By: Jasdeep Anand on Mon, 12 December 2011 02:41
		Re: The best way to bin data to a grid? (may not be an IDL-specific question) By: Fabzou on Mon, 12 December 2011 02:34
		Re: The best way to bin data to a grid? (may not be an IDL-specific question) By: Jasdeep Anand on Mon, 12 December 2011 01:51
		Re: The best way to bin data to a grid? (may not be an IDL-specific question) By: David Fanning on Sun, 11 December 2011 18:29

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