Hi John, I'm not sure how to do this with ggplot, but: Time<- c("Age.25","Age.35","Age.45","Age.55") Medians<-c(128.25,148.75,158.5,168.75) > is.character(Time) # [1] TRUE - thus it has no intrinsic numeric value to plot > is.numeric(Medians) # [1] TRUE # coerce Medians to factor and then plot against Time, but can't do point/line plot(as.factor(Time),Medians,type="p") # let R determine the x values (1:4) and omit the x-axis plot(Medians,type="b",xaxt="n") # add the x-axis with the "Time" labels axis(1,at=1:4,labels=Time)
On Thu, Jul 13, 2023 at 11:18 AM Sorkin, John <jsor...@som.umaryland.edu> wrote: > > I am trying to plot four points, and join the points with lines. I can plot > the points, but I can't plot the points and the line. > I hope someone can help my with my ggplot code. > > # load ggplot2 > if(!require(ggplot2)){install.packages("ggplot2")} > library(ggplot2) > > # Create data > Time <- c("Age.25","Age.35","Age.45","Age.55") > Medians <-c(128.25,148.75,158.5,168.75) > themedians <- matrix(data=cbind(Time,Medians),nrow=4,ncol=2) > dimnames(themedians) <- list(NULL,c("Time","Median")) > # Convert to dataframe the data format used by ggplot > themedians <- data.frame(themedians) > themedians > > # This plot works > ggplot(themedians,aes(x=Time,y=Median))+ > geom_point() > # This plot does not work! > ggplot(themedians,aes(x=Time,y=Median))+ > geom_point()+ > geom_line() > > Thank you, > John > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.