On Saturday, January 26, 2013 1:37:30 AM UTC-5, JCW wrote: > ...I cannot figure out how to to anything similar with Interpolation[...,Method->"Delaunay"] from the Obtuse package... (I'm running Mathematica 7, so I had to download and install the free package from Ingolf Dahl's site.) Any suggestions? -- JCW
Problem Solved: This anomaly does not occur with my second choice, Method->"RBF", although finding the interpolation function is much slower. Perhaps the problem was that Delaunay interpolation does not have continuous derivatives?