title: R ggplots with anti-aliasing and wmf format on windows
body: <p>I'm trying to export a ggplot to word as an windows metafile on windows platform. Some suggest cairo to remove aliasing, but I need to save the plot as windows metafile, which don't work with wmf.
  <code>ggsave(plot=plot,filename=&quot;plot.wmf&quot;,type=&quot;cairo&quot;)</code></p>
  <p>gives</p>
  <p><code>Error in grDevices::win.metafile(...) : unused argument (type = &quot;cairo&quot;)</code></p>
  <p>Do anyone have a solution?</p>