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How can I create transparant colour
2 messages · Dr. Alireza Zolfaghari, Brian Ripley
Well, if it is transparent then you will not see it: I presume you mean translucent (aka semi-transparent). With 50% opacity you could use red <- rgb(0x9E, 0x47, 0x70, 127, max=255) polygon(xvalue1,yvalue1,col=red,border=red) See ?rgb. You can also specify a translucent colour as e.g. "#9E47707F", but that seems less intuitive.
On Thu, 4 Dec 2008, Dr. Alireza Zolfaghari wrote:
Hi list, Does any one know how I can make the red colour transparant? ######################### par() #Set up blank plot to remove plot border type lty="n" xvalue1<- c(1,2,2,1) xvalue2<- c(1,3,3,1) yvalue1<- c(0,0,22,22) yvalue2<- c(0,0,44,44) plot(c(min(xvalue2),max(xvalue2)),c(min(yvalue2),max(yvalue2)),type="n",xaxt="n",yaxt="n",xlab="",ylab="Loss in ?m",yaxs="i",xaxs="r") polygon(xvalue2,yvalue2,col="#A8B50A",border="#A8B50A") polygon(xvalue1,yvalue1,col="#9E4770",border="#9E4770") ######################### regards, Alireza [[alternative HTML version deleted]]
Brian D. Ripley, ripley at stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595