# TransformedRegion, RegionPlot broken in 10.0.2.0?

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

After

• A damaged installation, likely not. It's a miscalculated default PlotRegion, that's all. – rcollyer Jan 28 '15 at 13:40
• @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. – Jinxed Jan 28 '15 at 14:16
• @rcollyer: And the error messages resulting from processing the documentation page indicate, that there is something wrong here. – Jinxed Jan 28 '15 at 14:21
• 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. – rcollyer Jan 28 '15 at 14:47
• @rcollyer: I take it you have the same behavior (error messages, PlotArea-problem) when evaluating the online documentation reference page? – Jinxed Jan 28 '15 at 16:59

## 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 -

http://support.wolfram.com