# png output for comparison
I expected the blank space around the plot in the wmf file to be minimal, and comparable to that in the equivalent png file. This means such wmf files cannot e.g. be programmatically inserted into PowerPoint slides because the extra white space causes problems by covering other elements. They would have to be cropped first.
It works as expected on
version.string R version 3.4.0 (2017-04-21)
but not on
version.string R version 3.4.1 (2017-06-30)
I don't know if this problem is related to R version issue or is a Windows 7/10 issue.