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Re: st: query regarding thin plate spline method


From   behailu ayele <bbezabih@googlemail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: query regarding thin plate spline method
Date   Tue, 6 Dec 2011 16:26:31 +0000

Thanks Nick,
I am hoping somebody on statalist or Stas Kolenikov would guide me on
retreiving those figures from the graph as my programming skill is
really quite poor.

thanks again
Behailu


On 12/6/11, Nick Cox <n.j.cox@durham.ac.uk> wrote:
> I don't think -thinplate- promises any where to give you the interpolations
> as data. It seems that you would have to write your own code using the basis
> functions, or hack at the graph code to output what it shows. Stas Kolenikov
> is a member of this list and presumably he is able to say more. But it seems
> that this is a program he wrote some years ago and is not maintaining.
>
> Nick
> n.j.cox@durham.ac.uk
>
> behailu ayele
>
> Dear Nick
>
> Thanks so much . As usual your suggestions helped. Thinplate is
> running but like you said, it is generating me graphs and not giving
> me the interpoliated figures I am looking for.
>
> My reason for using the thinplate method is because I am using climate
> data from several stattions and the papers that use similar data say
> they use the thin plate spline method to interpoliate climate data
> from meteorological stations into farm level observations.
>
> It would be great if you or anybody in the list could help me
> understand how the thin plate spline method that I am using right now
> enables me do that.
>
>
> On 12/6/11, Nick Cox <njcoxstata@gmail.com> wrote:
>> -thinplate- is a program by Stas Kolenikov available from his website.
>> You are asked to explain where user-written programs you refer to come
>> from.
>>
>> Your two problems are that you have installed -thinplate- but Stata
>> cannot find it, and that you have run -thinplate- but see no results.
>> The first is difficult to comment on as you say nothing about how you
>> installed it and where.
>>
>> Either way,
>>
>> 1. -thinplate- says it is for smoothing, but you say you want
>> interpolation.
>>
>> 2. -thinplate- gives a complete example in its help. You should be
>> able to test your installation by running that example.
>>
>> 3. -thinplate- is for Stata 7 and runs old-style graphics.
>>
>> 4. For your second problem the advice in the Statalist FAQ applies as
>> usual.
>>
>> "Say exactly what you typed and exactly what Stata typed (or did) in
>> response. N.B. exactly! If you can, reproduce the error with one of
>> Stata's provided datasets or a simple concocted dataset that you
>> include in your posting."
>>
>> 5. Stata 12 includes contouring based on thin plate splines. See
>>
>> http://www.stata.com/help.cgi?twoway_contour
>>
>> Conversely, if you are not using Stata 12, the FAQ advises you to make
>> that clear.
>>
>> Nick
>>
>> On Tue, Dec 6, 2011 at 9:27 AM, behailu ayele <bbezabih@googlemail.com>
>> wrote:
>>
>>> I am trying to do interpoliations to my climate data using the thin
>>> plate spline method. I searched in statalist and I found an ado file
>>> for that (which I paste below). I have now faced two problems: when I
>>> install THINPLATE and try to recall it in stata, I get error message
>>> saying THINPLATE is not found. The second problem is when I just copy
>>> the ado file and run it straigt in stata, the lines run fine but I get
>>> no output. My programming knowledge in stata is  poor so any help on
>>> this is much appreciated.
>>>
>>> Also if there are easier ways of doing interpoliations in stata, you
>>> may sugget them to me as well.
>>
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