Hao Jiang wrote:
Hi,
I want to plot a polynomial in the form like ax^2 + bxy + cy^2 + dx + ey + f
=0 without solving it(since I may have 3 or 4 dimensional polynomial and
it's really hard to solve). Is there any way to plot this kind of
polynomial?
Thanks a lot!
There are lots of ways. A contour plot is probably most informative, a
persp plot is prettier. In either case you need to evaluate the
polynomial on a grid, and pass the matrix of values to the plotting
function.
The outer() function is handy for doing the grid evaluation.
Duncan Murdoch
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