Re: ContourPlot Problem

*To*: mathgroup at smc.vnet.net*Subject*: [mg83099] Re: ContourPlot Problem*From*: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>*Date*: Sun, 11 Nov 2007 02:54:06 -0500 (EST)*Organization*: The Open University, Milton Keynes, UK*References*: <fh3qip$l1$1@smc.vnet.net>

Kevin J. McCann wrote: > I am having a problem with the following code and that is that not all > of the contours are plotted. > > \[Beta]=. > x=. > z=. > V[\[Beta]_,x_,z_]:=1/Sqrt[x^2+z^2]1/Sqrt[1-\[Beta]^2x^2/(x^2+z^2)] > cntrs=Table[c,{c,0.05,5,0.05}]; > L=6; > > > ContourPlot[V[0.9,x,z],{x,-L,L},{z,-L,L},Contours->cntrs,FrameLabel->{"x","z"}] > > > > In fact if I set the contours to lie between 4 and 5, say, then no > contours are plotted. Che pasa? Assuming I have correctly understood you, what you want is a hundred equally-spaced contour lines to be displayed. The following expression will do that: ContourPlot[V[0.9, x, z], {x, -L, L}, {z, -L, L}, Contours -> 100, FrameLabel -> {"x", "z"}] Regards, -- Jean-Marc