Thanks, Jim. The code works, but I don't understand why you use q1090 <- quantile(DF1$B, probs=c()), rather than DF1$A? Also, how to add a legend for both points DF1 and DF2?
On Wed, Jul 12, 2017 at 8:25 PM, Jim Lemon <drjimle...@gmail.com> wrote: > Hi lily, > Here is the first plot: > > plot(DF1$A,DF1$B,pch=19,col="red") > meanA<-mean(DF1$A) > meanB<-mean(DF1$B) > points(meanA,meanB,pch=18,col="red") > q1090<-quantile(DF1$B,probs=c(0.1,0.9)) > library(plotrix) > dispersion(meanA,meanB,q1090[2],q1090[1], > intervals=FALSE,col="red") > > The same code will work for a second data frame, except that you would > use "points" instead of "plot" and change the color. You may also have > to specify xlim and ylim in the first call to "plot" so that all > values are on the plot. > > Jim > > > > On Thu, Jul 13, 2017 at 11:46 AM, lily li <chocol...@gmail.com> wrote: > > Hi R users, > > > > I have a question about plotting. There is the dataframe below, while > each > > row represents a record. If I want to plot on a A-B plot, i.e., x-axis > > represents A, while y-axis represents B values. However, I want to plot > the > > mean value from records 1-10 as one point, while the 10th and 90th > > percentiles represent the error bars, such as one point in the attached > > example. I don't know how to do this, and then add a legend. > > After the above step, if I have a dataframe DF2 with the same structure > but > > different values than DF1, how to show the point on the same figure, but > > use different colors or symbols? Thanks for any advices. > > > > DF1 > > > > A B C > > 1 65 21 54 > > 2 66 23 55 > > 3 54 24 56 > > 4 44 23 53 > > 5 67 22 52 > > 6 66 21 50 > > 7 45 20 51 > > 8 56 19 57 > > 9 40 25 58 > > 10 39 24 53 > > > > ______________________________________________ > > 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. > [[alternative HTML version deleted]] ______________________________________________ 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.