[R] Transparent backgrounds in png files
p.connolly at hortresearch.co.nz
Wed Jul 28 23:59:26 CEST 2004
The result I'm aiming to achieve is a bitmap that can be imported into
a PowerPoint file that shows what's behind the lines of the plot.
There's a way in PowerPoint that almost works. By choosing a colour
to set as transparent, what is behind the graphic is indeed visible,
but it's at the expense of losing line and text definition.
I notice there have been discussions about transparent backgrounds
mostly with lattice plots. The problem most people seem to have was
getting a blue background when they wanted a white one.
Mine is the reverse (and I'm using standard graphics, not Lattice).
I'm trying to get a transparent background but it always comes out
white. Setting bg = "transparent", I've tried using a bitmap device
to create a png file. I've also tried creating a postscript file and
converting it to a PNG file using the Gimp. I've always used a
resolution of 300 dpi in bitmaps since the default is far too low.
Other ideas appreciated.
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