Define a function as a graphics directive?
- To: mathgroup at smc.vnet.net
- Subject: [mg105020] Define a function as a graphics directive?
- From: Porscha Louise McRobbie <pmcrobbi at umich.edu>
- Date: Wed, 18 Nov 2009 06:58:03 -0500 (EST)
Hi,
I have a very simple contour plot:
ContourPlot[ z Exp[-Sqrt[z^2 + x^2]/2.], {x, -10, 10}, {z, -10, 10},
ContourShading -> None, Contours -> 15,
ContourStyle -> {{Black, Thick}}]
I do not want the plot shaded, but I want to color the contour lines
according to a function of z (e.g., Sign[z], where z>0 is black, z<0
is red). Can this be done within ContourStyle?
I tried putting a function definition for the color inside
ContourShading, but I get an error since it's not a graphics directive
(and it's my understanding that ColorFunction is only for shading the
regions between contours).
Thanks for any input!
Porscha