ggplot returned a ggplot object with no layers as indicated by the error: "Error: No layers in plot" You need to add the layers to the object. So in you example: p1 <- ggplot(asd.df, aes(x=Time, y=Values, colour=Country)) then add the points (or something else) p1 + geom_point()
Thomas (Tom) Keller, PhD email: kellert at ohsu.edu<http://ohsu.edu>, ph: 503.494.2442, office: RJH 5333 url: http://www.ohsu.edu/dnaseq/ On Mar 7, 2013, at 3:00 AM, <r-help-requ...@r-project.org<mailto:r-help-requ...@r-project.org>> wrote: From: Jim Lemon <j...@bitwrit.com.au<mailto:j...@bitwrit.com.au>> Subject: Re: [R] Plotting time data for various countries in same graph Date: March 6, 2013 3:25:55 AM PST To: Anindya Sankar Dey <anindy...@gmail.com<mailto:anindy...@gmail.com>> Cc: "r-help@r-project.org<mailto:r-help@r-project.org>" <r-help@r-project.org<mailto:r-help@r-project.org>> On 03/06/2013 07:06 PM, Anindya Sankar Dey wrote: Hi, I've the following kind of data Time Country Values 2010Q1 India 5 2010Q2 India 7 2010Q3 India 5 2010Q4 India 9 2010Q1 China 10 2010Q2 China 6 2010Q3 China 9 2010Q4 China 14 I needed to plot a graph with the x-axis being time,y-axis being he Values and 2 line graph , one for India and one for counry. I don't have great knowledge on graphics in R. I was trying to use, ggplot(data,aes(x=Time,y=Values,colour=Country)) But this does not help. Can anyone help me with this? Hi Anindya, This might be a start for you: asd.df<-read.table( text="Time Country Values 2010Q1 India 5 2010Q2 India 7 2010Q3 India 5 2010Q4 India 9 2010Q1 China 10 2010Q2 China 6 2010Q3 China 9 2010Q4 China 14 ",header=TRUE) # Time is read as a factor, so it can be used directly in plotting as.numeric(asd.df$Time) [1] 1 2 3 4 1 2 3 4 plot(as.numeric(asd.df$Time)[asd.df$Country == "India"], asd.df$Values[asd.df$Country == "India"], type="l",col=4,lwd=2,xaxt="n",xlab="Financial Quarter", ylab="Value",ylim=c(0,14)) lines(as.numeric(asd.df$Time)[asd.df$Country == "China"], asd.df$Values[asd.df$Country == "China"], col=2,lwd=2) axis(1,at=1:4,labels=paste("Q",1:4,sep="")) legend(2,2,c("India","China"),lty=1,lwd=2,col=c(4,2)) Jim [[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.
