Re: Polar Plot

*To*: mathgroup at smc.vnet.net*Subject*: [mg82715] Re: Polar Plot*From*: Szabolcs Horvát <szhorvat at gmail.com>*Date*: Tue, 30 Oct 2007 03:15:48 -0500 (EST)*References*: <fg4dhs$6dc$1@smc.vnet.net>

Miguel wrote: > How can I to plot a polar expresion in implicit form. For example, > r^2==3+2*r*Cos[teta] I believe that there is no built-in function for this, so either try to write it in an explicit form and use PolarPlot[], Solve[r^2 == 3 + 2*r*Cos[teta], r] or write the expression in Cartesian coordinates and use ContourPlot[] r^2 == 3 + 2*r*Cos[teta] //. {r -> Sqrt[x^2 + y^2], Cos[teta] -> x/r} -- Szabolcs