getting radial data into a cartesian grid

*To*: mathgroup at smc.vnet.net*Subject*: [mg22124] getting radial data into a cartesian grid*From*: "R. Lopez-Aleman" <lopez at phys.psu.edu>*Date*: Wed, 16 Feb 2000 02:34:40 -0500 (EST)*Organization*: Penn State University, Center for Academic Computing*Sender*: owner-wri-mathgroup at wolfram.com

This appears to be a simple problem, but I'm getting nowhere fast. I'm evolving gravitational wave emission from a perturbative code and it gives the output as a file of (r, theta, amplitude) set. I want to graph it on Mathematica as a (x,y,amplitude) surface so that the spherical wave propagation out of the center can be seen more clearly. Since the grid is not too fine, converting the (r,theta) data into (x,y) just gives a few radial lines. I wanted to use Interpolation[data] to get an Interpolating function that would approximate the wave and graph it with Plot3D. But Interpolation gives an error saying that "the number of points do not match the object in Dimension 2". Is there any way to manipulate the polar data into a Cartesian graph so that it looks like waves flowing out of the black hole in an animation? -- ============================================= Ramon Lopez-Aleman Physics Dept Center for Gravitational Physics and Geometry Pennsylvania State University 320-J Osmond Lab email: lopez at phys.psu.edu http://www.phys.psu.edu/~lopez =============================================