Hi, Here is an example using ggplot2. For future reference, it would be convenient if you provided sample data. This is actually pretty easy to do: dput(yourdata) or if your data is very large: dput(head(yourdata)). At any rate, here is an example with the means plotted as points and connected with a line and error bars around them. The line is controlled by geom_line() so you can easily add or remove it.
# Load ggplot2 library(ggplot2) # Create some sample data dat <- data.frame(X = as.Date(Sys.time()) - 0:10, Y1 = sample(20:30, 11, replace = TRUE), Y2 = sample(2:6, 11, replace = TRUE)) # Actual plot ggplot(data = dat, aes(x = X, y = Y1, ymin = Y1 - Y2, ymax = Y1 + Y2)) + geom_point() + # points at the means geom_line() + # if you want lines between pints geom_errorbar() # error bars, Y1 - Y2 and Y1 + Y2 HTH, Josh On Tue, Oct 19, 2010 at 1:41 AM, ashz <a...@walla.co.il> wrote: > > Hi, > > I have a data set with 3 rows (X=date, Y1=arithmetic mean and Y2=standard > deviation). How can I create a graph(e.g., points) which will show the > +-stdev as well (similar to excel). > > Thanks > > -- > View this message in context: > http://r.789695.n4.nabble.com/points-x-y-mean-and-standard-deviation-tp3001683p3001683.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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. > -- Joshua Wiley Ph.D. Student, Health Psychology University of California, Los Angeles http://www.joshuawiley.com/ ______________________________________________ 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.