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Re: A complicate problem for building a map [message #36738 is a reply to message #36690]

Mon, 20 October 2003 04:42

Olaf Stetzer
Messages: 39
Registered: September 2001

Member

ftls1@uaf.edu schrieb:
> I met a problem of map building as below,
> I have two 2-D tables of RT(nw,nt), RW(nw,nt), nw and nt are
> constants,
> both RT and RW range from -1 to +1, the value of nw, even though it is
> 'integer',actually means wind speed from
> -50 m/s to 50 m/s and the nt means temperature from 0 to 300 K.
> Now I want to get a table with x and y axis of RT and RW respectively.
> The purpose to build such a table is that if there is an arbitrary
> pair
> of RW and RT value, I can look it in the table and find the
> appropriate
> wind and temperature.
> I've been thinking on this topic for a couple of weeks without any
> idea, in C
> language there is a concept of 'Group', but IDL does not.

I am not sure if I understood you correctly but maybe you can use
the where() function to find your information. You want the "cordinates"
where:
wind = 50 m/s and T= 250 K ?

wind_temp_indices=where(RT eq 250 and RW eq 50) ; or use the "coded"
; values for 250 K and 50 m/s instead

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[Message index]

		A complicate problem for building a map By: ftls1 on Wed, 15 October 2003 10:51
		Re: A complicate problem for building a map By: ftls1 on Tue, 21 October 2003 15:02
		Re: A complicate problem for building a map By: Olaf Stetzer on Tue, 21 October 2003 00:33
		Re: A complicate problem for building a map By: condor on Mon, 20 October 2003 15:49
		Re: A complicate problem for building a map By: ftls1 on Mon, 20 October 2003 14:52
		Re: A complicate problem for building a map By: Olaf Stetzer on Mon, 20 October 2003 04:42
		Re: A complicate problem for building a map By: ftls1 on Sat, 18 October 2003 23:23
		Re: A complicate problem for building a map By: condor on Thu, 16 October 2003 16:36

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