Plotting a phase boundary

*To*: mathgroup at smc.vnet.net*Subject*: [mg61283] Plotting a phase boundary*From*: dkjk at bigpond.net.au*Date*: Fri, 14 Oct 2005 05:55:09 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

I have a series of Table objects, each consisting of a 100 x 100 matrix divided into a region of 1's and 0's. For an example file see http://users.bigpond.net.au/jdstokes/DATA.CSV Then try pts = Import["DATA.CSV"]; ListContourPlot[pts]; (Actually, this matrix should be inverted) My goal is to find the boundary between the 1's and 0's, or an approxmimation to it, and plot all of the boundaries (for each of the matrices) together in a 3-dimensional surface plot so as to obtain a surface. The surface will then correspond to the "phase transition" between, say 0 (inside the surface) and 1 (outside the surface). I think I might be asking too much. I would like to know if it is possible for a relatively inexperienced user of Mathematica to achieve this. Thanks in advance. James