[Rd] Error messages in replayPlot()

Jeroen Ooms jeroen at berkeley.edu
Mon May 15 14:07:28 CEST 2017

I was wondering if there is something that can be done to improve
error messages when replaying a recorded plot. For example a graphics
device that is too small usually results in a helpful error message:

 png(height = 100)
 # Error in plot.new() : figure margins too large

However when this happens when replaying a recorded plot, the error
message is not so helpful.

 myplot <- evaluate::evaluate("plot(1)")[[2]]
 png(height = 100)
 # Error in replayPlot(x) : invalid graphics state

A more informative error message that hints at what exactly is invalid
about the graphics state would be very helpful in this case.

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