...Just read in your JPEG and add an alpha channel manually, then assign values for transparency. Of course for printing you need to use a device that accepts alpha.
See how it's done HERE.
9 Nov 2011
Add Transparency to JPEG - Yes, We Can!
...Just read in your JPEG and add an alpha channel manually, then assign values for transparency. Of course for printing you need to use a device that accepts alpha.
See how it's done HERE.
Labels:
arrays
,
as.raster()
,
jpeg
,
R
,
R Graphs
,
Transparency
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Nice post! In order to make your code more platform-independent you can import the Rlogo.jpg image using:
ReplyDeleteimg <- readJPEG(system.file("img", "Rlogo.jpg", package="jpeg"))
..thanks, you're right!
ReplyDeletethanks for share it.
ReplyDelete