I am trying to plot a graph but the points on the graph should be
different symbols and colors. It should represent what is in the legend.
I tried using the points command but this does not work. Is there
another command in R that would allow me to use different symbols and
colors for the points?
Thank you kindly.
data(mtcars)
plot(mtcars$wt,mtcars$mpg,xlab= "Weight(lbs/1000)", ylab="Miles
per
Gallon")
mtcars$wt.cyl<-mtcars$wt[mtcars$cyl]
mtcars$mpg.cyl<-mtcars$mpg[mtcars$cyl]
points(mtcars$wt.cyl, mtcars$mpg.cyl, pch = 17, col = "red")
title("Motor Trend Data")
text(2,10,"LTR",cex=1.2,adj=0,col=3)
legend(4,30,c("4 cylinder","6 cylinder","8
cylinder"),pch=c(3,17,19),
cex=1.2, col=c("blue", "red", "purple4"))
LTR
[[alternative HTML version deleted]]
Perhaps
plot(mtcars$wt,mtcars$mpg,xlab= "Weight(lbs/1000)", ylab="Miles
per
Gallon", pch=c(3,17,19), col=c("blue", "red",
"purple4"))
On 01/10/2007, Letticia Ramlal <lramlal@claflin.edu>
wrote:>
> I am trying to plot a graph but the points on the graph should be
> different symbols and colors. It should represent what is in the legend.
> I tried using the points command but this does not work. Is there
> another command in R that would allow me to use different symbols and
> colors for the points?
>
> Thank you kindly.
>
>
>
>
>
> data(mtcars)
>
> plot(mtcars$wt,mtcars$mpg,xlab= "Weight(lbs/1000)",
ylab="Miles per
> Gallon")
>
> mtcars$wt.cyl<-mtcars$wt[mtcars$cyl]
>
> mtcars$mpg.cyl<-mtcars$mpg[mtcars$cyl]
>
> points(mtcars$wt.cyl, mtcars$mpg.cyl, pch = 17, col = "red")
>
> title("Motor Trend Data")
>
> text(2,10,"LTR",cex=1.2,adj=0,col=3)
>
> legend(4,30,c("4 cylinder","6 cylinder","8
cylinder"),pch=c(3,17,19),
> cex=1.2, col=c("blue", "red", "purple4"))
>
>
>
>
>
> LTR
>
>
>
>
>
>
> [[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.
>
--
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O
[[alternative HTML version deleted]]
On Mon, 1 Oct 2007, Letticia Ramlal wrote:> I am trying to plot a graph but the points on the graph should be > different symbols and colors. It should represent what is in the legend. > I tried using the points command but this does not work.WHAT "does not work" ??? points() puts points on a plot with colors and symbols as you specify them. example(points) illustrates this with several different setups. It even shows how to construct "red symbols with a yellow interior (where available)"!! Read the help page, run and study the example()'s Is there> another command in R that would allow me to use different symbols and > colors for the points? > > Thank you kindly. > > > > > > data(mtcars) > > plot(mtcars$wt,mtcars$mpg,xlab= "Weight(lbs/1000)", ylab="Miles per > Gallon") > > mtcars$wt.cyl<-mtcars$wt[mtcars$cyl] > > mtcars$mpg.cyl<-mtcars$mpg[mtcars$cyl] > > points(mtcars$wt.cyl, mtcars$mpg.cyl, pch = 17, col = "red") > > title("Motor Trend Data") > > text(2,10,"LTR",cex=1.2,adj=0,col=3) > > legend(4,30,c("4 cylinder","6 cylinder","8 cylinder"),pch=c(3,17,19), > cex=1.2, col=c("blue", "red", "purple4")) > > > > > > LTR > > > > > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at 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. >Charles C. Berry (858) 534-2098 Dept of Family/Preventive Medicine E mailto:cberry at tajo.ucsd.edu UC San Diego http://famprevmed.ucsd.edu/faculty/cberry/ La Jolla, San Diego 92093-0901
You might find it easier to use the ggplot2 (http://had.co.nz/ggplot2) package:
install.packages("ggplot2")
library(ggplot2)
qplot(mpg, wt, data=mtcars, colour=factor(cyl))
# or
qplot(mpg, wt, data=mtcars, shape=factor(cyl))
ggplot2 takes care of mapping the variable values to colours and
sizes, and produces a legend for you. You can tweak the mapping using
different scales, see, for example,
http://had.co.nz/ggplot2/scale_hue.html.
Hadley
On 10/1/07, Letticia Ramlal <lramlal at claflin.edu>
wrote:> I am trying to plot a graph but the points on the graph should be
> different symbols and colors. It should represent what is in the legend.
> I tried using the points command but this does not work. Is there
> another command in R that would allow me to use different symbols and
> colors for the points?
>
> Thank you kindly.
>
>
>
>
>
> data(mtcars)
>
> plot(mtcars$wt,mtcars$mpg,xlab= "Weight(lbs/1000)",
ylab="Miles per
> Gallon")
>
> mtcars$wt.cyl<-mtcars$wt[mtcars$cyl]
>
> mtcars$mpg.cyl<-mtcars$mpg[mtcars$cyl]
>
> points(mtcars$wt.cyl, mtcars$mpg.cyl, pch = 17, col = "red")
>
> title("Motor Trend Data")
>
> text(2,10,"LTR",cex=1.2,adj=0,col=3)
>
> legend(4,30,c("4 cylinder","6 cylinder","8
cylinder"),pch=c(3,17,19),
> cex=1.2, col=c("blue", "red", "purple4"))
>
>
>
>
>
> LTR
>
>
>
>
>
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at 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.
>
--
http://had.co.nz/
I don't think your code is doing what you think it is doing. Try
something like:
with(mtcars, plot(wt, mpg, xlab= "Weight(lbs/1000)", ylab="Miles
per
Gallon",
col=
c('','','','blue','','red','','purple')[cyl],
pch= c(0,0,0,3,0,17,0,19)[cyl]))
legend(4,30,c("4 cylinder","6 cylinder","8
cylinder"),pch=c(3,17,19),
cex=1.2, col=c("blue", "red", "purple4"))
--
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at intermountainmail.org
(801) 408-8111
> -----Original Message-----
> From: r-help-bounces at r-project.org
> [mailto:r-help-bounces at r-project.org] On Behalf Of Letticia Ramlal
> Sent: Monday, October 01, 2007 12:34 PM
> To: r-help at stat.math.ethz.ch
> Subject: [R] how to plot a graph with different pch
>
> I am trying to plot a graph but the points on the graph
> should be different symbols and colors. It should represent
> what is in the legend.
> I tried using the points command but this does not work. Is
> there another command in R that would allow me to use
> different symbols and colors for the points?
>
> Thank you kindly.
>
>
>
>
>
> data(mtcars)
>
> plot(mtcars$wt,mtcars$mpg,xlab= "Weight(lbs/1000)",
ylab="Miles per
> Gallon")
>
> mtcars$wt.cyl<-mtcars$wt[mtcars$cyl]
>
> mtcars$mpg.cyl<-mtcars$mpg[mtcars$cyl]
>
> points(mtcars$wt.cyl, mtcars$mpg.cyl, pch = 17, col = "red")
>
> title("Motor Trend Data")
>
> text(2,10,"LTR",cex=1.2,adj=0,col=3)
>
> legend(4,30,c("4 cylinder","6 cylinder","8
> cylinder"),pch=c(3,17,19), cex=1.2, col=c("blue",
"red", "purple4"))
>
>
>
>
>
> LTR
>
>
>
>
>
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at 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.
>