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ImplicitPlot    --    outputs the zero locus of a bivariate polynomial to a file


Syntax 
ImplicitPlot(F: POLY, Xrange: LIST, Yrange: LIST)

Description
This function evaluates the first argument, a bivariate polynomial, at a grid of points in the range given by the second and third arguments. The coordinates of the approximate zeroes are output to a file called CoCoAPlot. See ImplicitPlotOn for outputting to another file.

This result can be plotted using your preferred plotting program. For example, start gnuplot and then give it the command 
  plot CoCoAPlot
to see the plot.

Example 
/**/  use R ::= QQ[x,y];
/**/  ImplicitPlot(x^2 + y^2 - 200^2, [-256,256], [-256,256]);
Plotting points...10%...20%...30%...40%...50%...60%...70%...80%...90%...100%
800 plotted points have been placed in the file CoCoAPlot

See Also