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MathGroup Archive 1999

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Re: Not Plotting Vertical Assymptotes

  • To: mathgroup at
  • Subject: [mg18602] Re: Not Plotting Vertical Assymptotes
  • From: Alan Lewis <alanlewis at>
  • Date: Tue, 13 Jul 1999 01:01:30 -0400
  • Organization: @Home Network
  • References: <7m6ivl$>
  • Sender: owner-wri-mathgroup at

You can make two plots, p1 from 0 to 1 and p2 from
1 to 2, and then use Show[p1,p2].

Patrick McLean wrote:
> Anyone have any idea how to stop Plot putting a (near) vertical line at
> x=2 in the command:
>       Plot[1/(1-x),{x,0,2}]
> ie. detect that the function 1/(1-x) has a singularity at x=2 and do
> something about it. This is analagous to numerically integrating over a
> (integrable) singularity, where the following remedy works:
>       NIntegrate[1/Abs[Sqrt[x-1]]^2,{x,0,1,2}]
> But in this case it doesn't work. Decreasing MaxBend works a bit but the
> line is still there.
> (I am really interested in drawing paths in the plane using ParmetricPlot)
> Any ideas or comments
> --
> Patrick McLean
> No news is good news...

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