Problems with ImplicitPlot
- To: mathgroup at christensen.cybernetics.net
- Subject: [mg1235] Problems with ImplicitPlot
- From: Mats Jirstrand <matsj at isy.liu.se>
- Date: Fri, 26 May 1995 04:40:01 -0400
I have a problem with the function ImplicitPlot in the
Graphics package!
Why does Mathematica generate a plot of the unit circle
for the first of the below commands but not for the second?
ImplicitPlot[x^2+y^2-1==0, {x, -2, 2}]
ImplicitPlot[(x^2+y^2-1)^2==0, {x, -2, 2}]
I have also tried the ContourPlot function with the same result:
ContourPlot[x^2+y^2-1, {x, -2, 2},{y, -2, 2},
Contours -> {0},
ContourShading -> False]
Plots the unitcircle!
ContourPlot[(x^2+y^2-1)^2, {x, -2, 2},{y, -2, 2},
Contours -> {0},
ContourShading -> False]
An empty plot!
~~Mats