       Re: plot a function of two variables

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• Subject: [mg128406] Re: plot a function of two variables
• From: Murray Eisenberg <murray at math.umass.edu>
• Date: Sun, 14 Oct 2012 00:12:22 -0400 (EDT)
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```On Oct 13, 2012, at 1:03 AM, Miguel Aragon <aragon.miguel at gmail.com> wrote:

>
> I have a question about how to plot a function of two variable of the form
> (x-a)^2 + (y-b)^2 = r^2 with Mathematica v 7.0?  Is it possible?

Use ContourPlot. For example:

ContourPlot[(x - 1)^2 + (y + 1)^ 2== 3^2, {x, -4, 5}, {y, -5, 4},
ContourStyle -> Thick, Axes -> True, Frame -> False, AxesLabel -> "x", "y"}]

Notice that with this form of ContourPlot, where the first argument is a function, you do not specify the Contours option.

---
Murray Eisenberg
murray at math.umass.edu
Mathematics & Statistics Dept.
Lederle Graduate Research Tower                      phone 413 549-1020 (H)
University of Massachusetts                                413 545-2838 (W)
710 North Pleasant Street                            fax   413 545-1801
Amherst, MA 01003-9305

```

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