Dear List,
I would like to create several graphs of similar data. I have x and y values
for several different individuals (in this case fish). I would like to plot the
x and y values for each fish separately. I can do it using a for loop, but I
think I should be using "apply". Please let me know what I am doing
wrong, or if there is a "better" way to do this. What I have is:
#Test data
dat<-data.frame(c(rep(1:10,4)),c(rep(1:10,4)),c(rep(c("Tony","Mike","Vicky","Fred"),each=10)))
names(dat)<-c("x","y","Name")
#Create function to plot x and y
myplot<-function() plot(dat$x,dat$y)
#Apply the function to each of the names
par(mfcol=c(2,2))
apply(dat,2,myplot,by=dat$Name) #Does not work - tried various versions
I would like separate plots for Tony, Mike, and Vicky. What is the best way to
do this?
Thank!
Tim
Tim Clark
Department of Zoology
University of Hawaii
On Tue, 26 May 2009 02:34:55 -0700 (PDT) Tim Clark <mudiver1200 at yahoo.com> wrote: TC> I would like separate plots for Tony, Mike, and Vicky. What is the TC> best way to do this? use the lattice package: library(lattice) xyplot(y~x|Name,data=dat) Mr. Sarkar (the author of the package) has written an excellent book on his package I recommend it. hth Stefan
Tim Clark wrote:> Dear List, > > I would like to create several graphs of similar data. I have x and y values for several different individuals (in this case fish). I would like to plot the x and y values for each fish separately. I can do it using a for loop, but I think I should be using "apply". Please let me know what I am doing wrong, or if there is a "better" way to do this. What I have is: > > #Test data > dat<-data.frame(c(rep(1:10,4)),c(rep(1:10,4)),c(rep(c("Tony","Mike","Vicky","Fred"),each=10))) > names(dat)<-c("x","y","Name") > > #Create function to plot x and y > myplot<-function() plot(dat$x,dat$y) > > #Apply the function to each of the names > par(mfcol=c(2,2)) > apply(dat,2,myplot,by=dat$Name) #Does not work - tried various versions > > I would like separate plots for Tony, Mike, and Vicky. What is the best way to do this? > > Thank! > > Tim > > > Tim Clark > Department of Zoology > University of Hawaii > > ______________________________________________ > 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. >Hi Tim, I'm now rather fond of Hadley Wickham's ggplot2 package. Its structure is most of the times intuitive and it does yield nice-looking output. In order to solve your problem, taking advantage of the ggplot2 framework, you can simply use the following:> library(ggplot2) ; > ## If you want all the curves to be on the same plotting grid ; > > p <- ggplot(dat, aes(x=x,y=y, group=Name)) ; > p + geom_line(aes(colour=Name)) ; ## Only one curve will be visible > since they are all superposed. > > ## If you want the curves to be on separate plotting grids ; > > p <- ggplot(dat, aes(x=x,y=y, group=Name)) ; > p <- p + geom_line(aes(colour=Name)) ; > p+facet_grid(. ~ Name) ;Hope this helps, -- *Luc Villandr?* /Biostatistician McGill University Health Center - Montreal Children's Hospital Research Institute/
Luc, Thanks! I was not aware of that package. It looks a lot easier than what I have been trying to do! Aloha, Tim Tim Clark Department of Zoology University of Hawaii --- On Tue, 5/26/09, Luc Villandre <villandl at dms.umontreal.ca> wrote:> From: Luc Villandre <villandl at dms.umontreal.ca> > Subject: Re: [R] Creating multiple graphs based on one variable > To: "Tim Clark" <mudiver1200 at yahoo.com> > Cc: r-help at r-project.org > Date: Tuesday, May 26, 2009, 4:01 AM > Tim Clark wrote: > > Dear List, > > > > I would like to create several graphs of similar > data.? I have x and y values for several different > individuals (in this case fish).? I would like to plot > the x and y values for each fish separately.? I can do > it using a for loop, but I think I should be using > "apply".? Please let me know what I am doing wrong, or > if there is a "better" way to do this.? What I have > is: > > > > #Test data > > > dat<-data.frame(c(rep(1:10,4)),c(rep(1:10,4)),c(rep(c("Tony","Mike","Vicky","Fred"),each=10))) > > names(dat)<-c("x","y","Name") > > #Create function to plot x and y > > myplot<-function() plot(dat$x,dat$y) > > > > #Apply the function to each of the names > > > par(mfcol=c(2,2))???apply(dat,2,myplot,by=dat$Name) > #Does not work - tried various versions > > > > I would like separate plots for Tony, Mike, and > Vicky.? What is the best way to do this?? > > Thank! > > > > Tim > > > > > > Tim Clark > > Department of Zoology University of Hawaii > > > > ______________________________________________ > > 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. > >??? > > Hi Tim, > > I'm now rather fond of Hadley Wickham's ggplot2 package. > Its structure is most of the times intuitive and it does > yield nice-looking output. > > In order to solve your problem, taking advantage of the > ggplot2 framework, you can simply use the following: > > library(ggplot2) ; > > ## If you want all the curves to be on the same > plotting grid ; > > > > p <- ggplot(dat, aes(x=x,y=y, group=Name)) ; > > p + geom_line(aes(colour=Name)) ; ## Only one curve > will be visible since they are all superposed. > > > > ## If you want the curves to be on separate plotting > grids ; > > > > p <- ggplot(dat, aes(x=x,y=y, group=Name)) ; > > p <- p + geom_line(aes(colour=Name)) ; > > p+facet_grid(. ~ Name) ; > Hope this helps, > -- *Luc Villandr?* > /Biostatistician > McGill University Health Center - > Montreal Children's Hospital Research Institute/ >
Stefan, Thanks for the suggestion. Lattice works great. You might also want to check out the ggplot2 package that Luc suggested. They both seem to provide quite a few more options than the basic graphics package in R. Aloha, Tim Tim Clark Department of Zoology University of Hawaii --- On Mon, 5/25/09, Stefan Grosse <singularitaet at gmx.net> wrote:> From: Stefan Grosse <singularitaet at gmx.net> > Subject: Re: [R] Creating multiple graphs based on one variable > To: "Tim Clark" <mudiver1200 at yahoo.com> > Cc: r-help at r-project.org > Date: Monday, May 25, 2009, 11:55 PM > On Tue, 26 May 2009 02:34:55 -0700 > (PDT) Tim Clark > <mudiver1200 at yahoo.com> > wrote: > > TC> I would like separate plots for Tony, Mike, and > Vicky.? What is the > TC> best way to do this?? > > use the lattice package: > > library(lattice) > xyplot(y~x|Name,data=dat) > > Mr. Sarkar (the author of the package) has written an > excellent book on > his package I recommend it. > > hth > Stefan >