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Re: coordinates in LogLogPlots

  • To: mathgroup at smc.vnet.net
  • Subject: [mg112208] Re: coordinates in LogLogPlots
  • From: Joseph Gwinn <joegwinn at comcast.net>
  • Date: Sat, 4 Sep 2010 04:03:09 -0400 (EDT)
  • References: <i5l9pf$7e6$1@smc.vnet.net> <i5ng9l$2jc$1@smc.vnet.net>

In article <i5ng9l$2jc$1 at smc.vnet.net>,
 "Sjoerd C. de Vries" <sjoerd.c.devries at gmail.com> wrote:

> Hi Allesandro,
> 
> It seems that Epilog is kept outside the coordinate system used for
> the loglogplot. If you take the Log (base E) of the coordinates in the
> Epilog graphics they end up in the correct location. Of course, a disk
> is not going to look good in loglog plots. Perhaps you could use
> points or so.

One can correct the ellipse back to a circle.  Works, but can be fiddly.


> Cheers -- Sjoerd
> 
> On Sep 1, 12:26 pm, Alessandro <alexxx.ma... at gmail.com> wrote:
> > my fault without doubt, I keep on banging my head against the surreal
> > coordinate usage in Mathematica.
> >
> > Currently I am trying to place a Disk[] in the Epilog section of a
> > LogLogPlot - using as disk coordinates the plot coordinates - and I
> > see that it doesnt work, I dont know why.
> >
> > Show[LogLogPlot[700*x^-0.4, {x, 100, 10^6}, Frame -> True,  PlotRange -
> > {{10, 10^6}, {1, 100}},
> >
> >  Epilog -> {Disk[{3,4.2},0.1]}]
> >
> > Since it seems to me that also the Legend system is broken in Log
> > plots, do you know if this is also true in this case?
> >
> > thanks!
> >
> > alessandro


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