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Re: RE: Re: Problem with plotting two functions

  • To: mathgroup at
  • Subject: [mg43757] Re: [mg43745] RE: [mg43666] Re: [mg43637] Problem with plotting two functions
  • From: Murray Eisenberg <murray at>
  • Date: Fri, 3 Oct 2003 02:28:44 -0400 (EDT)
  • Organization: Mathematics & Statistics, Univ. of Mass./Amherst
  • References: <>
  • Reply-to: murray at
  • Sender: owner-wri-mathgroup at

All I can tell you is what it says in the documentation:

  With the Automatic setting, the distribution of coordinate values is 
found, and any points sufficiently far out in the distribution are 
dropped. Such points are often produced as a result of singularities in 
functions being plotted.

That give no clue as to what "sufficiently far out" means.  Perhaps it's 
a proprietary matter.  But I've seldom constructed such a complicated 
plot that, if I didn't like what Mathematica chose as the PlotRange (by 
its Automatic default setting), I couldn't immediately change that and 
re-plot without wasting more than a second or two.

You may want to use the form

    PlotRange -> {min, Automatic}

for PlotRange.  Look up PlotRange in the HelpBrowser for explanation.

kimsj wrote:

> Dear Murray Eisenberg,
>>-----Original Message-----
>>From: Murray Eisenberg [mailto:murray at]
To: mathgroup at
> To: mathgroup at
>>Subject: [mg43757] [mg43745] [mg43666] Re: [mg43637] Problem with plotting two functions
>>Plot[{x^3 - 6x, 8 - 3x^2}, {x, -5, 4}, PlotRange -> All]
> Yes, it's an exact solution to what the newbie asked. However, why
> doesn't this option turn on by default? If this option should be off by
> default, could you let me know how Mathematica find the range of the
> clipped y-axis? This will help decide whether I turn on this option in
> further situations.
> Thank you in advance.
>>Murray Eisenberg                     murray at
> Sung jin Kim
> i-Networking Lab, Samsung AIT.
> (communication at

Murray Eisenberg                     murray at
Mathematics & Statistics Dept.
Lederle Graduate Research Tower      phone 413 549-1020 (H)
University of Massachusetts                413 545-2859 (W)
710 North Pleasant Street            fax   413 545-1801
Amherst, MA 01003-9305

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