comp.lang.idl-pvwave archive: archive » A complicate problem for building a map

Home » Public Forums » archive » A complicate problem for building a map

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: A complicate problem for building a map [message #36733 is a reply to message #36690]

Tue, 21 October 2003 00:33

Olaf Stetzer
Messages: 39
Registered: September 2001

Member

ftls1@uaf.edu schrieb:
> yes, I used 'where' function and intersected the two sets to find
> temperature and wind.
>
> the problem is whether this retrieval method was converging? is the
> point the nearst one with least RMS?

The where function does only logical comparisons, which means you only
get a result if the data contains exactly the values you are looking
for. If you are looking for nearest values you have to calcualte them on
your own, something like:

RT_dev=abs(RT-250) ; nearest values to 250 K
RW_dev=abs(RW-50) ; nearest values to 50 m/s
RTW_dev=RT_dev*RW_dev ; or use smth. like sqrt(RT_dev^2 + RW_dev^2)
; depending on your needs. Then:
wind_temp_indices= where (RTW_dev eq min(RTW_dev))

Olaf

Report message to a moderator

[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

Previous Topic:	Re: perl script to create html documentation from source files available
Next Topic:	Re: Median filter the hard way

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Sat Oct 11 02:01:57 PDT 2025

Total time taken to generate the page: 0.15942 seconds