[R] How to use alpha transparency channel for colors?

2004-10-07 Thread kwright
The release notes for R 2.0.0 states: It is now possible to specify colours with a full alpha transparency channel via the new 'alpha' argument to the rgb() and hsv() functions, or as a string of the form #RRGGBBAA. NOTE: most devices draw nothing if a colour is not opaque, but PDF

Re: [R] How to use alpha transparency channel for colors?

2004-10-07 Thread Deepayan Sarkar
On Thursday 07 October 2004 10:01, [EMAIL PROTECTED] wrote: The release notes for R 2.0.0 states: It is now possible to specify colours with a full alpha transparency channel via the new 'alpha' argument to the rgb() and hsv() functions, or as a string of the form #RRGGBBAA. NOTE:

Re: [R] How to use alpha transparency channel for colors?

2004-10-07 Thread Prof Brian Ripley
On Thu, 7 Oct 2004 [EMAIL PROTECTED] wrote: The release notes for R 2.0.0 states: Would that be the NEWS file? R does not have `release notes' per se. It is now possible to specify colours with a full alpha transparency channel via the new 'alpha' argument to the rgb() and hsv()

Re: [R] How to use alpha transparency channel for colors?

2004-10-07 Thread kwright
Brian Ripley wrote: As so often happens, the `something wrong' is not reading the help file. As the NEWS file _also_ says o A 'version' argument has been added to pdf() device. If this is set to 1.4, the device will support transparent colours. pdf(alpha.pdf, version=1.4)

Re: [R] How to use alpha transparency channel for colors?

2004-10-07 Thread Roger D. Peng
There happens to be a nice article about this by Paul Murrell in the most recent R Newsletter at http://cran.r-project.org/doc/Rnews/. -roger [EMAIL PROTECTED] wrote: The release notes for R 2.0.0 states: It is now possible to specify colours with a full alpha transparency channel via the