       Re: How to write code for Plotting Polar Coordinates in r

• To: mathgroup at smc.vnet.net
• Subject: [mg127259] Re: How to write code for Plotting Polar Coordinates in r
• From: Bob Hanlon <hanlonr357 at gmail.com>
• Date: Wed, 11 Jul 2012 18:23:12 -0400 (EDT)
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• References: <20120711061622.C3B356839@smc.vnet.net>

```I do not understand your equations.  r should be a function of theta
and if theta were a single value (e.g., 1) there would be only a
single point. Also, what is the ^.= in the equations?

Clear[r]

r[theta_] = theta (1 - theta^2);

PolarPlot[r[theta], {theta, -1, 1}]

PolarPlot[r[theta], {theta, -1, 1},
PlotStyle -> Red,
PolarAxes -> Automatic,
PolarGridLines -> {
Range[0, 2 Pi, Pi/4],
Range[0.1, 0.3, 0.1]},
PolarTicks -> {"Degrees", Automatic},
GridLinesStyle -> LightGray]

Bob Hanlon

On Wed, Jul 11, 2012 at 2:16 AM, Rahul Chakraborty
<rahul.6sept at gmail.com> wrote:
> Dear All,
>
>  Kindly guide me regarding how to have polar plot in mathematica.
>
>  I have gone through function PolarPlot in virtual book but unable to
> get my syntax correctly for the following eqn:
>
>
>                      r^.=r(1-r^2)
>
>                     \[Theta]^.=1
>
>
>
>
> Regards,
>
> Rahul
>

```

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