Re: coordinates in LogLogPlots
- To: mathgroup at smc.vnet.net
- Subject: [mg112148] Re: coordinates in LogLogPlots
- From: "Carl K. Woll" <carlw at wolfram.com>
- Date: Thu, 2 Sep 2010 02:31:11 -0400 (EDT)
On 9/1/2010 5:27 AM, Alessandro 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
>
>
Try something like:
Epilog -> {Disk[Log@{100, 10}, .1]}
to produce a disk centered at {100, 10}. If the oblong shape of the disk
is a problem, you can use something like:
Epilog -> {Disk[Log@{100, 10}, 0.1 {GoldenRatio, 1}]}
instead.
Carl Woll
Wolfram Research