Thanks, Phil!

Does that mean only eight colors can be used in R plot?
THe following codes works for me, but, if I use the number, it does not
work.

plot(svm.auc, col=2, main="ROC curves comparing classification performance\n
of six machine learning models")
legend(0.5, 0.6, c(ns, nb, nr, nt, nl,ne), c(2,3,4,5,6,"black")) # Draw a
legend.

plot(bo.auc, col=3, add=T) # add=TRUE draws on the existing chart
plot(rf.auc, col=4, add=T)
plot(tree.auc, col=5, add=T)
plot(nn.auc, col=6, add=T)
plot(en.auc, col="black",lty=4,lwd=3, add=T)



On Wed, May 19, 2010 at 11:30 AM, Phil Spector <spector@stat.berkeley.edu>wrote:

> Changbin -
>   Please take a look at the help file for the function
> "palette", which is how R maps col= numbers to colors.
> Also look at the default output of that function:
>
>  palette()
>>
> [1] "black"   "red"     "green3"  "blue"    "cyan"    "magenta" "yellow"
> [8] "gray"
>
> You might get better results by specifying the colors that you
> want directly.
>
>                                        - Phil Spector
>                                         Statistical Computing Facility
>                                         Department of Statistics
>                                         UC Berkeley
>                                         spector@stat.berkeley.edu
>
>
>
> On Wed, 19 May 2010, Changbin Du wrote:
>
>  plot(svm.auc, col=2, main="ROC curves comparing classification
>> performance\n
>> of six machine learning models")
>> legend(0.5, 0.6, c(ns, nb, nr, nt, nl,ne), 2:6, 9) # Draw a legend.
>>
>> plot(bo.auc, col=3, add=T) # add=TRUE draws on the existing chart
>> plot(rf.auc, col=4, add=T)
>> plot(tree.auc, col=5, add=T)
>> plot(nn.auc, col=6, add=T)
>> plot(en.auc, col=9,lty="dotted",lwd=3, add=T)
>>
>> Hi, Dear community,
>>
>> I am use the above codes to draw plot, but find that col =9 is not used by
>> the R.  Instead, it use the col=2 when plot en.auc. WHy this happens and
>> how
>> to check the col allocation in R?
>>
>> Thanks!
>>
>>
>> --
>> Sincerely,
>> Changbin
>> --
>>
>>        [[alternative HTML version deleted]]
>>
>> ______________________________________________
>> R-help@r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>>
>>


-- 
Sincerely,
Changbin
--

	[[alternative HTML version deleted]]

