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Re: Is it possible to query current plot range values (or have

  • To: mathgroup at smc.vnet.net
  • Subject: [mg110750] Re: Is it possible to query current plot range values (or have
  • From: Daniel Huber <danielphuber at gmail.com>
  • Date: Sun, 4 Jul 2010 06:10:18 -0400 (EDT)
  • References: <i0pc5p$jut$1@smc.vnet.net>

On 04.07.2010 09:10, Leo Alekseyev wrote:
> Some of my plots contain vertical lines for alignment.  To make sure
> the lines extend from the top to the bottom of the plot frame, I
> typically give those lines large values for +y and -y coordinates.
> This has an unfortunate side effect that the directive PlotRange->All
> now considers my line to be a part of the plot, and rescales the plot
> range to display it in its entirety.  Is there a way to (a) either
> make PlotRange->All ignore this line somehow or (b) set the +y and -y
> coordinates of the line to match the current plot range?..
>
> Thanks in advance to anyone who might clarify this...
> --Leo
>
Hi Leo,
you may use scaled coordinates that run from 0..1:
Plot[Sin[x], {x, 0, 10},
  Epilog -> {Line[{Scaled at {0.5, 0}, Scaled at {0.5, 1}}]}]
Note that you must also give the x coordinate in the 0..1 scale.
cheers, Daniel


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