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Re: Problem with plotting two functions

  • To: mathgroup at smc.vnet.net
  • Subject: [mg43668] Re: Problem with plotting two functions
  • From: Bill Rowe <readnewsNOT_SPAM at mail.earthlink.net>
  • Date: Sun, 28 Sep 2003 06:00:51 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

On 9/27/03 at 4:57 AM, newbie at newbiehome.com (newbie) wrote:

> When I issue the command

> Plot[{x^3 - 6x, 8 - 3x^2}, {x, -5, 4}]

> The two functions are drawn but I do not see the first intersection point
> at (-4,-40). In another system, I see it.

> Can anybody tell me what to do?

Mathematica uses an internal algorithm to adjust the plot range to show what it considers the most interesting area of the plot. As A consequence, this clips regions you may be interested in. This can be defeated by explicitly setting the plot range so the region you are interested in is plotted. Specifically,

Plot[{x^3 - 6x, 8 - 3x^2}, {x, -5, 4}, PlotRange->All]

will show the intersection point at {-4,-40}


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