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 -------------- next part -------------- A non-text attachment was scrubbed... Name: sample.pdf Type: application/pdf Size: 6784 bytes Desc: not available URL: <https://stat.ethz.ch/pipermail/r-help/attachments/20170712/82301a81/attachment.pdf>

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 <chocold12 at 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 at 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.