See ?palette ?colors
the colors used when you use number are those in palette:
> palette()
[1] "black" "red" "green3" "blue" "cyan" "magenta" "yellow" "gray"
> plot(1:20,col=1:20)
You can define your own palette with colors available in colors:
> palette(colors()[sample(1:657,20)])
> palette()
[1] "peachpuff" "purple2" "gray37" "paleturquoise4"
[5] "hotpink" "mediumspringgreen" "gray82" "red2"
[9] "purple3" "cadetblue2" "gray55" "red"
[13] "tomato4" "gray39" "rosybrown" "darkorange1"
[17] "gray27" "lemonchiffon3" "oldlace" "honeydew"
> plot(1:20,col=1:20)
For the image function, you can enter your own vector of colors (by default, col = heat.colors(12)) and one way to define your colors is to use 'rgb' function with values for Red - Green - Blue.
Sincerely,
At 10:05 24/03/2004, Monica Palaseanu-Lovejoy wrote:
Hi,
Very so often when i am plotting something, doing a histogram, or whatever i am struggling to find out which are the numbers for different colors, palette names, types of lines, symbols, etc. Is there any documentation on line with all these numbers / names and the associated symbol / color???
For example if i am using the command image it uses a palette from red to yellow, with red the lowest value, and yellow the highest value. What if i want a reverse palette, with green the lowest value and yellow middle values and red highest value??? Or much more simple, just yellow lowest value and red highest value???
Thank you for assistance,
Monica
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