Surface Smoothing

*To*: mathgroup at smc.vnet.net*Subject*: [mg127604] Surface Smoothing*From*: "Nicholas Kormanik" <nkormanik at gmail.com>*Date*: Mon, 6 Aug 2012 04:38:29 -0400 (EDT)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*Delivered-to*: l-mathgroup@wolfram.com*Delivered-to*: mathgroup-newout@smc.vnet.net*Delivered-to*: mathgroup-newsend@smc.vnet.net*Reply-to*: <nkormanik at gmail.com>

This is a follow-up to a post I made last week (included at bottom). My ListPlot3D output is pretty spiky, with spikes extending above and below. Quite hard to get a sense where any "sweet spots" might exist - "neighborhood average" relatively high. I've looked into using the various forms of Interpolate. None of those will "smooth the surface," as they all require passing through the original data points. I'm wondering if any of you might know of a third-party Mathematica package that will do surface smoothing? Please guide me to such package, if you do. Or if you know of another approach that'll get the job done. Thanks, Nicholas From: Nicholas Kormanik [mailto:nkormanik at gmail.com] Sent: Friday, August 03, 2012 1:04 AM To: 'mathgroup at smc.vnet.net' Subject: [mg127604] ListContourPlot I've been attempting to create a contour plot within Mathematica 8.04. I posted to the Mathematica StackExchange, but didn't get a conclusive answer: http://mathematica.stackexchange.com/questions/8821/creating-optimal-smoothe d-contour-type-plots-x-y-z-using-mathematica-8-04 Hopefully someone here can assist. Here is a link to the data file: http://rapidgator.net/file/29594247/20201_23405_50502.XLS.html Here is a link to an example contour plot, made in another program (SAS): http://rapidgator.net/file/29594680/50502_20201_23405.png.html In case the files do not make it through to you, the data file is an Excel .xls file with three columns, X,Y,Z. Z in the contour plot would be shown by contours or a gradient of colors. If a contour plot isn't possible, perhaps ListPlot3D? The process is far from straight-forward. Definitely a learning curve involved. Unfortunately the Mathematica documentation almost exclusively gives examples using functions and distributions, not standard data columns for input. Thanks, Nicholas Kormanik