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Re: Draw straight line, but display zigzag line!

  • To: mathgroup at smc.vnet.net
  • Subject: [mg17615] Re: Draw straight line, but display zigzag line!
  • From: adam.smith at hillsdale.edu
  • Date: Tue, 18 May 1999 02:45:18 -0400
  • Organization: Deja News - The Leader in Internet Discussion
  • References: <7hohic$fvn@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

I realize your concerns about the on-screen appearance of your line.  I have
found a way to make it look straight.  Try the following:

Plot[2*x+1,{x,0,10},PlotPoints->2]

One problem with this is that the axes range is changed from your original
Plot[2*x+1,{x,0,10}]

But this appears to give the same axes:

Plot[2*x+1,{x,0,10},PlotPoints->2,PlotRange->{{0,10.2},{0,21.5}}]

You can of course play with the PlotRange to suit your tastes.

I should also point out that the "zig-zag" problem appears to be limited to
the screen display.  I printed all three forms and the hardcopy looked very
straight for all of them.  Maybe there is some option buried deep in the help
files that I did not feel like spending the time to uncover that will make
the screen version appear "straighter".  I tried MaxBend, PlotPoints,
PlotDivision and experimented with Compiled options but none of these seemed
to fix the displayed graph.

Adam Smith

In article <7hohic$fvn at smc.vnet.net>,
  "bickel" <bickel at ms17.hinet.net> wrote:
>
> I have a problem about drawing a straight.
>
> When I draw a straight ,ex: y=2x+1.
>
> I use Plot[2*x+1,{x,0,10}], it actually draw a line.
>
> But the line is like zigzag line.
>
> Can I do about this problem, setup some graphic option
>
> or ....?
>
>

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