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Re: gridding large amounts of data [message #2928 is a reply to message #2805]

Thu, 06 October 1994 22:44

agraps
Messages: 35
Registered: September 1994

Member

dan@danberg.llnl.gov (Dan Bergmann) writes:

[..]
> ... I could do this in an ugly do loop that
> looked like

> data=fltarr(360,180)
> 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.

This is a kind of idl "gotcha". I wrestled with this on a late
evening, a few years ago, when I similarly had to loop for greater
than 32,767 times.

The secret is to make i a long integer:
for iL=1,num do $
^^^

And that will solve your problem.

Amara

************************************************************ **********
Amara Graps email: agraps@netcom.com
Computational Physicist vita: finger graps@clio.arc.nasa.gov
Intergalactic Reality bio: finger -lm agraps@netcom.com
************************************************************ **********
"Picture a massless particle." --A Koan of Modern Physics

--

************************************************************ **********
Amara Graps email: agraps@netcom.com
Computational Physicist vita: finger graps@clio.arc.nasa.gov
Intergalactic Reality bio: finger -lm agraps@netcom.com
************************************************************ **********
"Picture a massless particle." --A Koan of Modern Physics

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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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