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Re: gridding large amounts of data [message #2943 is a reply to message #2805]

Thu, 06 October 1994 05:54

landers
Messages: 45
Registered: May 1993

Member

In article <36v30k$14n@danberg.llnl.gov>, dan@danberg.llnl.gov (Dan Bergmann) writes:

[snip]

|> for i=1,num do $
|> data(longitude(i),latitude(i)) = data(longitude(i),latitude(i)) + value(i)
|>
|> This works fine for small values of num, but for num>32,767 I get an error
|> saying my do loop index is too large. Can I write do loops with limits
|> greater than 32,767 ??

That's easy - use LONGS:

for i = 0L, Num-1 do ...
^^

You should always use longs when you're addressing arrays - just in case
someday you have a bigger array - you won't always get errors....

Could I rewrite this in vector syntax using the
|> where statement ??

Well, for the loop you've written, you can use:

i = lindgen( num )
data(longitude(i),latitude(i)) = data(longitude(i),latitude(i)) + value(i)

If you're using PV-WAVE, there's a couple of good gridders (in what
used to be the ARL) called FAST_GRID3 and GRID_3D. Sounds like
FAST_GRID3 would work pretty good for your data.

I'm sure IDL has some kind of gridder, but I don't know what it is or
what it does.

;Dave

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[Message index]

		gridding large amounts of data By: dan on Wed, 05 October 1994 13:40
		Re: gridding large amounts of data By: candey on Wed, 05 October 1994 17:06
		Re: gridding large amounts of data By: lmudge on Sun, 09 October 1994 17:47
		Re: gridding large amounts of data By: agraps on Fri, 07 October 1994 08:29
		Re: gridding large amounts of data By: agraps on Thu, 06 October 1994 22:44
		Re: gridding large amounts of data By: bowman on Sat, 15 October 1994 11:59
		Re: gridding large amounts of data By: landers on Thu, 06 October 1994 05:54
		Re: gridding large amounts of data By: landers on Thu, 06 October 1994 07:44

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