Re: [R] How to plot curves with more than 8 colors
I have found this little function useful when trying to choose colors:
showcols - function (indx = 0:6)
{
for (ii in unique(indx)) {
is - 100 * ii + 1:100
if (min(is) length(colors())) {
cat(Maximum value of arg is, floor(length(colors())/100),
\n)
return(NULL)
}
foo - matrix(colors()[is], nrow = 10)
par(mar = c(3, 3, 0.25, 0.25))
plot(1:10, 1:10, type = n, yaxt = n, xlab = , ylab = )
axis(2, at = 1:10, lab = 10:1)
for (j in 1:10) {
for (i in 1:10) {
points(j, 11 - i, col = foo[i, j], pch = 16,
cex = 4)
text(j, 11 - i - 0.3, foo[i, j], cex = 0.8)
}
}
if (length(indx) 1 ii max(indx))
readline(paste(Currently showing group, ii, CR to continue ))
}
invisible(foo)
}
Just type
showcols()
at the R prompt. Then pick any 20 you happen to think are distinguishable.
Based on my own experience, I would doubt that it is possible to find
20 easily distinguishable colors.
But perhaps if you use both solid and dotted lines you can get 20
distinguishable lines.
-Don
At 10:48 AM +0800 12/28/05, Vincent Deng wrote:
Hi,
Thanks for your kindly reply.
I think maybe I didn't specify color codes properly. That is,the
difference between each color is not sharp enough for me to identify
them as different colors.
So can you tell me about how to specify the color properly so that the
difference among each color can be identified clearly?
Thanks again and again ...
On 12/27/05, Uwe Ligges [EMAIL PROTECTED] wrote:
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 [EMAIL PROTECTED] 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...
__
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--
--
Don MacQueen
Environmental Protection Department
Lawrence Livermore National Laboratory
Livermore, CA, USA
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Re: [R] How to plot curves with more than 8 colors
Don MacQueen [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] I have found this little function useful when trying to choose colors: FWIW: To choose colors, this page http://research.stowers-institute.org/efg/R/Color/Chart/index.htm and PDF http://research.stowers-institute.org/efg/R/Color/Chart/ColorChart.pdf can be used to view the named colors in R, along with RGB information in decimal or hex. Not everyone can see the same colors. In particular, about 7% of males have some color blindness, especially red-green. See some of the links under Color Blindness: http://www.efg2.com/Lab/Library/Color/index.html Not all devices have the same color gamut. That is, not all devices can display the same ranges of colors: http://www.efg2.com/Lab/Library/Color/Science.htm#gamuts Matching color between the screen and printers can be a problem. efg __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] How to plot curves with more than 8 colors
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...
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] How to plot curves with more than 8 colors
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?
Best Regards...
On 12/27/05, Uwe Ligges [EMAIL PROTECTED] 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...
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] 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 [EMAIL PROTECTED] 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...
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] How to plot curves with more than 8 colors
Hi,
Thanks for your kindly reply.
I think maybe I didn't specify color codes properly. That is,the
difference between each color is not sharp enough for me to identify
them as different colors.
So can you tell me about how to specify the color properly so that the
difference among each color can be identified clearly?
Thanks again and again ...
On 12/27/05, Uwe Ligges [EMAIL PROTECTED] wrote:
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 [EMAIL PROTECTED] 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...
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html
__
R-help@stat.math.ethz.ch mailing list
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Re: [R] How to plot curves with more than 8 colors
It might be hard to differentiate between each color with having 255 of
them. Here is an example of using ColorRampPalette to create a set of
colors. You can experiment with as many differing ones as you want to to
get the difference that you want:
# use 5 colors to create a sequence (you can add more colors if you want to)
f.c - colorRampPalette(c('red','green','orange','blue','yellow'))(255)
plot(0,type='n', ylim=c(0,255), xlim=c(0,1))
for (i in 1:255) segments(0, i, 1, i, col=f.c[i])
On 12/27/05, Vincent Deng [EMAIL PROTECTED] wrote:
Hi,
Thanks for your kindly reply.
I think maybe I didn't specify color codes properly. That is,the
difference between each color is not sharp enough for me to identify
them as different colors.
So can you tell me about how to specify the color properly so that the
difference among each color can be identified clearly?
Thanks again and again ...
On 12/27/05, Uwe Ligges [EMAIL PROTECTED] wrote:
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 [EMAIL PROTECTED] 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...
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html
__
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Jim Holtman
Cincinnati, OH
+1 513 247 0281
What the problem you are trying to solve?
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[R] How to plot curves with more than 8 colors
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?
Best Regards...
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
