How to plot curves with more than 8 colors

Vincent Deng wrote:

Dear Uwe,

Sorry, I did not describe my question clearly. I created a matrix to
store color code using rgb function.

abc = rgb(6:36,0,0,maxColorValue = 255)

And after running codes like this

for (i in c(1:20))
{
   points(...,...,col=abc[i])
   lines(...,col=abc[i])
}

R still used 8 colors of abc color codes repeatedly to draw the diagram

Any helps?

No, it does not (in fact, all appears to be more or less black on my
screen ;-)). Another example:

plot(1:255, col=rgb(1:255,0,0,maxColorValue = 255))

Uwe Ligges

Best Regards...

On 12/27/05, Uwe Ligges <ligges at statistik.uni-dortmund.de> wrote:

Vincent Deng wrote:

Hi,

I'm a new hand in R language. I have about 20 groups of data[x,y] and
want to plot them on a graph. To do this, I write a for-loop as
following: (some codes are omitted for simplicity)

for (i in c(1:20))
{
 points(...,...,col=i)
 lines(...,col=i)
}

The problem is "R only plot them with 8 colors repeatly". Could anyone
help me solve this problem? Or is there any package providing plot
function without color limit?

After typing

 ?colors

I get a nice help page that points me to a lot of other functions that
generate more than 8 colors. Maybe your installation of R is broken and
you cannot see this help page? You certainly tried to get help on colors
as well.

There is no limit of the color number in the functions above, simply
specify the color you want to get. The only color limit applies for the
device and for most devices and rgb colors this is 256^3.

Uwe Ligges

Best Regards...