Multiple conditions in ContourPlot
- To: mathgroup at smc.vnet.net
- Subject: [mg102999] Multiple conditions in ContourPlot
- From: Theo Moore <tsg.moore at googlemail.com>
- Date: Thu, 3 Sep 2009 19:54:25 -0400 (EDT)
Suppose I had a function f[z] and I wanted to plot the contour such
that the imaginary part of f[z] is zero and the real part is positive.
I thought I could use:
ContourPlot[ (Im[f[x + y*I] == 0) && (Re[f[x + y*I] >= 0), {x, -5, 5},
{y, -5, 5}]
But it does not work.
I can do it using only one. For example,
ContourPlot[Im[f[x + y*I] == 0, {x, -5, 5}, {y, -5, 5}]
But how do you use multiple logical conditions?