[Tikzdevice-bugs] Error when using raster image and reverting axis

[Charlie Sharpsteen]

I see a similar error on OS X. The problem is that when the axis is 
reversed, R passes a negative width to the C routines. Since the R 
documentation made no mention of this behavior, I wrote the raster routines 
for tikzDevice under the assumption that width and height were positive 
numbers.

Thanks for reporting, this has been logged as issue #53:

  https://github.com/Sharpie/RTikZDevice/issues/53

-Charlie