vertical plane in plot3D

*To*: mathgroup at smc.vnet.net*Subject*: [mg113140] vertical plane in plot3D*From*: Greg Colbourn <gcolbourn at hotmail.com>*Date*: Fri, 15 Oct 2010 13:50:19 -0400 (EDT)

Hi, Sorry for the basic question. But I'm having trouble plotting a vertical pl= ane in Plot3D. I've got a surface graph, but I want to overlay an transpa= rent plane at a set value on the x axis. So, I want to plot x=80 for al= l y and z. Plot3D[x = 80, {x, 0, 100}, {y, 0, 100}] just gives me z=80 for all x and y (i.e. a horizontal plane) Cheers,Greg =