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A general description is here.
There is support for cairographics-based devices using the same code as on Unix-alikes. This can be selected by the new ‘type’ argument of the bitmap devices ‘bmp()’, ‘jpeg()’, ‘png()’ and ‘tiff()’. New devices ‘svg()’, ‘cairo_pdf()’ and ‘cairo_ps()’ are available.
[Experimental and not compiled in by default.
To experiment with them, follow the instructions in the ‘R Installation and Administration Manual’.]