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Re: interpolation [message #78593 is a reply to message #2184]

Wed, 07 December 2011 12:07

Jeremy Bailin
Messages: 618
Registered: April 2008

Senior Member

On 12/7/11 5:50 PM, anil wrote:
> On Dec 7, 6:42 pm, Russell<rryan....@gmail.com> wrote:
>> I'm not exactly sure what the issue is, but interpol seems to work
>> fine?
>>
>> readcol,'data.dat',depth,temp,salinity,pot_temp,density
>> thisdepth=findgen(300)*5 ;the values where you want the temperature
>> -- whose derivative changes sign
>> thistemp=interpol(temp,depth,thisdepth)
>>
>> You might add /quad or /lsq for a better fit, or even use a better
>> spline routine...
>>
>> Russell
>>
>>
>>
>
> This is not working for sure! When I do this I get negative values and
> numbers as -3000,-4165 etc.. whereas my temperature range is between 4
> and 26.

Russell's code certainly works perfectly well on the data you provided.

-Jeremy.

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[Message index]

		Interpolation By: jun on Thu, 02 June 1994 10:44
		Re: Interpolation By: stl on Fri, 03 June 1994 01:14
		Re: Interpolation By: tarequeaziz on Mon, 14 April 2008 13:13
		Re: Interpolation By: Spon on Mon, 14 April 2008 11:44
		Re: Interpolation By: Spon on Mon, 14 April 2008 08:34
		Re: Interpolation By: tarequeaziz on Sat, 12 April 2008 17:56
		Re: Interpolation By: ben.bighair on Sat, 12 April 2008 15:26
		Re: Interpolation By: tarequeaziz on Sat, 12 April 2008 13:24
		Re: Interpolation By: ben.bighair on Sat, 12 April 2008 08:57
		Re: interpolation By: Yngvar Larsen on Thu, 08 December 2011 13:24
		Re: interpolation By: Brian Wolven on Thu, 08 December 2011 12:57
		Re: interpolation By: anil on Thu, 08 December 2011 04:15
		Re: interpolation By: anil on Thu, 08 December 2011 04:15
		Re: interpolation By: anil on Thu, 08 December 2011 04:15
		Re: interpolation By: Kenneth P. Bowman on Wed, 07 December 2011 14:25
		Re: interpolation By: Brian Wolven on Wed, 07 December 2011 12:27
		Re: interpolation By: David Fanning on Wed, 07 December 2011 12:13
		Re: interpolation By: Jeremy Bailin on Wed, 07 December 2011 12:07
		Re: interpolation By: anil on Wed, 07 December 2011 09:50
		Re: interpolation By: Russell[1] on Wed, 07 December 2011 08:42
		Re: interpolation By: anil on Wed, 07 December 2011 05:51
		Re: interpolation By: anil on Wed, 07 December 2011 05:48

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