8
$\begingroup$

After having had trouble applying TranslationTransform to a simple region like so

RegionPlot[TransformedRegion[Rectangle[],TranslationTransform[{2,0}]]]

I tried to find my error by researching Mathematica's online documentation, specifically ref/TransformedRegion. After having failed to find a glitch in my code, I just did an "Evaluate Notebook" from the "Evaluation" menu, with a discouraging result:

  1. Error messages: RegionPlot::nnregion, RegionPlot::invplotreg, TransformedRegion::reg, DiscretizeRegion::regp, RegionDistance::regp, Volume::reg, Integrate::ilim, MinValue::elemc, Reduce::elemc, RegionBounds::reg, RegionDistance::regp (in that order).
  2. Different RegionPlot-outputs, which, as comments showed, are due to wrong PlotRange (so, there is a workaround for this by manually changing that option).

My question is: Is my 10.0.2.0 installation damaged or might this be a problem with Mathematica itself?

I have the same results on two machines (Windows 7 and Windows 8.1, both 64bit).

Examples

Before evaluating the documentation page

before evaluation before evaluation 2 enter image description here

After

after evaluation after evaluation 2 enter image description here

$\endgroup$
  • $\begingroup$ A damaged installation, likely not. It's a miscalculated default PlotRegion, that's all. $\endgroup$ – rcollyer Jan 28 '15 at 13:40
  • $\begingroup$ @rcollyer: You may be right, but the display (especially the closed boundaries) are highly misleading. In that state, the region plotting functionality is not really usable with TransformedRegion. $\endgroup$ – Jinxed Jan 28 '15 at 14:16
  • $\begingroup$ @rcollyer: And the error messages resulting from processing the documentation page indicate, that there is something wrong here. $\endgroup$ – Jinxed Jan 28 '15 at 14:21
  • $\begingroup$ I don't contest those conclusions, just the conclusion that it is a damaged installation. You can verify that it is the PlotRange by setting PlotRange -> {{-1, 0.6}, {0, 1.4}} for the first example and PlotRange -> {{-8, 15}, {-4, 8}} for the second. $\endgroup$ – rcollyer Jan 28 '15 at 14:47
  • $\begingroup$ @rcollyer: I take it you have the same behavior (error messages, PlotArea-problem) when evaluating the online documentation reference page? $\endgroup$ – Jinxed Jan 28 '15 at 16:59
7
$\begingroup$

Problem Confirmed

Wolfram has confirmed this to be a problem with Mathematica 10.0.2.0, not a damaged installation. There is no known workaround for now.

Transcript of the confirmation mail (dated 2015-01-28):

Hello -

Thank you for your email.

I have filed a report with our developers on this issue with 
TransformedRegion so that they are aware of the problem.
This may allow them to fix the problem in a future version of
Mathematica.  I am not aware of any workarounds for this 
problem at the current time, but I will be sure to pass on
any useful information should it become available.
Please let me know if you have any further questions. 

~[name masked]~
Technical Support
Wolfram Research, Inc.
http://support.wolfram.com
$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.