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MathGroup Archive 2003

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Re: Cursors in graphics

  • To: mathgroup at smc.vnet.net
  • Subject: [mg39615] Re: Cursors in graphics
  • From: "John Jowett" <John.Jowett at cern.ch>
  • Date: Wed, 26 Feb 2003 02:42:19 -0500 (EST)
  • Organization: CERN
  • References: <b3a5s6$18v$1@smc.vnet.net> <b3f8g3$d7u$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

"Paul Abbott" <paul at physics.uwa.edu.au> wrote in message
news:b3f8g3$d7u$1 at smc.vnet.net...
> In article <b3a5s6$18v$1 at smc.vnet.net>,
>  "Y.A.Tesiram" <yas at pcomm.hfi.unimelb.edu.au> wrote:
>
> > I want to add cross-hairs to graphics so that I can navigate along a
plot
> > which is the result of say MultipleListPlot or ListPlot. Currently, I
have
> > just made functions that let me replot my plots close to the regions I'm
> > interested in and I "guesstimate" the coordinates by drawing a fine
grid.
>
> Perhaps
>
>   FrontEndExecute[  FrontEnd`HelpBrowserLookup["OtherInformation",
>     "Get Graphics Coordinates..."]]
>
> will help. On a Macintosh, if you hold down the \[OptionKey] as well,
> you can draw a rectangle on a graphic and paste the corners as the new
> PlotRange.
>

Paul, that's very useful.  By experimenting, I found that the Ctrl-Alt
combination does the same on Windows.

I also discovered another undocumented feature: by holding down Ctrl and
dragging you can digitise your freehand curve tracing or other doodling.
After selecting, a Ctrl-C is always needed to copy the list of coordinate
pairs to the clipboard.

John Jowett




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