you will need to specify colours as RGB values and then set transparency
via the "alpha" argument.
e.g.: color=rgb(0,0,0,alpha=0.3)
# will give black (0,0,0) and a transparency of 30%.
Best wishes
Christoph
On 18/12/2013 23:23, capricy gao wrote:
I checked as you suggested. However, I found that the number in those functions are the number of
colors. In contrast, my number here means a specific color, for example, 2 in my code means
"red", 3 in my code means "green"....
On Wednesday, December 18, 2013 1:18 PM, Duncan Murdoch
<murdoch.dun...@gmail.com> wrote:
On 13-12-18 2:08 PM, capricy gao wrote:
I found all the color transparency was defined with character color, or rgb
color. What if I have number code and still try to modify the transparency?
For example:
x=c(1:5)
color=c(2,2,3,4,5)
plot(x, col=color)
plot(x, col=color,pch=20)
here I defined color by numbers, how can I modify the transparency?
See the examples for ?palette.
Duncan Murdoch
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