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Re: Interpolation undocumented error

  • To: mathgroup at smc.vnet.net
  • Subject: [mg113269] Re: Interpolation undocumented error
  • From: Ingolf Dahl <Ingolf.Dahl at physics.gu.se>
  • Date: Thu, 21 Oct 2010 07:03:01 -0400 (EDT)

You might try my "Obtuse" package, downloadable from http://www.familydahl.  se/mathematica/ .
This package was inspired by exactly this error message, and it contains five different interpolation methods, defined as "methods" to the Interpolation function. Which method to choose depends strongly on the character of the data, so you probably need to experiment a little to see what suits your case.

Best regards

Ingolf Dahl
Ingolf.dahl at telia.com 

-----Ursprungligt meddelande-----
Fr=E5n: Hyatt, John S [mailto:jshyatt at gatech.edu]
Skickat: den 20 oktober 2010 10:06
Till: mathgroup at smc.vnet.net
=C4mne: [mg113232] Interpolation undocumented error

I am trying to use Interpolation to get an interpolation function of multid=
imensional data from light scattering.  I specifically want to be able to c=
alculate the value of the function at any point within certain parameters. =
 I have entered the data points as usual into Interpolation, but receive an=
 error message: 

"Interpolation::indim: The coordinates do not lie on a structured tensor pr=
oduct grid." 

This error is undocumented in the Mathematica Help as far as I can tell, an=
d I don't know what the error means (i.e. what is a structured tensor produ=
ct grid).  After searching the web for other people with the same issue, I =
found only one thread on Wolfram's archives where the Imtek Mathematica Sup=
plement was suggested as a fix and seemed to help the person.  However, the=
 IMS seems to be intended for use with an earlier version of Mathematica (I=
 have v7.0) and the installation instructions in any case aren't applicable=
 to this version.  Is there a fix for this in Mathematica, or does anyone k=
now of any way to get the interpolation function I am looking for?  Would u=
ninstalling Mathematica and installing version 6 followed by the IMS be the=
 only way to fix this? 

Thanks in advance for any help,
John H


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