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Difficulty with Interpolation / FunctionInterpolation

  • To: mathgroup at smc.vnet.net
  • Subject: [mg112761] Difficulty with Interpolation / FunctionInterpolation
  • From: Thomas Melehan <tpmelehan at gmail.com>
  • Date: Wed, 29 Sep 2010 04:16:07 -0400 (EDT)
  • References: <i7f2na$cum$1@smc.vnet.net> <201009240809.EAA18254@smc.vnet.net>

I am trying to calculate the volume under a given topography.  The data 
I have is topographic lines with {x,y,z} coordinates that are not on any 
grid pattern.  I am trying to utilize Interpolation or 
FunctionInterpolation to create an InterpolatingFunction for use in 
NIntegration.  It seems that since the data points are not well arranged 
I get the following message:

Interpolation::"indim" : "  
  StyleBox[\"\"\", \"MT\"]  The coordinates do not lie on a structured 
tensor \
product grid "

Does anyone have suggestion as to how I could sort the data to get the 
Interpolation to work?





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