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to get all parametric plots/line traces

• To: mathgroup at smc.vnet.net
• Subject: [mg114226] to get all parametric plots/line traces
• From: Narasimham <mathma18 at hotmail.com>
• Date: Sun, 28 Nov 2010 06:51:53 -0500 (EST)

How to get plot of family of curves, instead of being able to view
only one plot a at any point of time?

Animate[ContourPlot[(1 - lam) (x^2 + y^2 - x y - 1) +     lam (x^2 +
y^2 + x  y - 1) == 0,
 {x, -2, 2},  {y, -2, 2}, GridLines -> Automatic, Mesh -> {200, 200}],
{lam, -2, 2, .25}]