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Re: interpolation question [message #48459 is a reply to message #25895]

Mon, 24 April 2006 11:35

chen123.dian
Messages: 4
Registered: April 2006

Junior Member

Hi,

Thanks so much for all suggestions here.

I am so wonder that why IDL has no simple function like MATLAB's
'interp2'. Another problem is for value_locate. Some suggestions
mentioned to use value_locate. Here is a example to show my problem.

IDL> vec = [2.0, 5.0, 8.0, 10.0]
IDL> print, vec
2.00000 5.00000 8.00000 10.0000
IDL> loc = VALUE_LOCATE(vec, [0.0, 4.5, 5.0, 6.0, 12.0])
IDL> print, loc
-1 0 1 1 3

We can see the value of "4.5" corresponds to index location of "0".
Actually, the value of "4.5" should correspond to index location of "1"
because the value of "4.5" is closer to the value of "5.0" having index
location of "1".

Thanks.

Regards,

Chen

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[Message index]

		Interpolation question By: rkj on Wed, 25 July 2001 11:18
		Re: interpolation question By: chen123.dian on Thu, 20 April 2006 07:50
		Re: interpolation question By: Mark Hadfield on Thu, 20 April 2006 12:26
		Re: interpolation question By: peter.albert@gmx.de on Thu, 20 April 2006 08:47
		Re: interpolation question By: peter.albert@gmx.de on Thu, 20 April 2006 01:20
		Re: interpolation question By: news.verizon.net on Mon, 24 April 2006 12:47
		Re: interpolation question By: Paul Van Delst[1] on Mon, 24 April 2006 12:09
		Re: interpolation question By: Jo Klein on Mon, 24 April 2006 12:04
		Re: interpolation question By: chen123.dian on Mon, 24 April 2006 11:35
		Re: Interpolation question By: mchinand on Thu, 03 August 2006 09:01
		file_lines and expand path By: FL on Fri, 04 August 2006 08:23
		Re: Interpolation question By: greg michael on Thu, 03 August 2006 04:04
		Re: Interpolation question By: Mike Wallace on Wed, 02 August 2006 13:34
		Re: Interpolation question By: JD Smith on Wed, 02 August 2006 09:31
		Re: Interpolation question By: mchinand on Wed, 02 August 2006 09:37

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