Thanks, but if you have another closer look to my post, you will see that my question has nothing to do with drawing error bars on a plot.
What I want is to do a curve fit to a data with error bars. Best, e. On 14 Nov 2013, at 04:21, Suzen, Mehmet wrote: > If you are after adding error bars in a scatter plot; one example is > given below : > > #some example data > set.seed(42) > df <- data.frame(x = rep(1:10,each=5), y = rnorm(50)) > > #calculate mean, min and max for each x-value > library(plyr) > df2 <- ddply(df,.(x),function(df) > c(mean=mean(df$y),min=min(df$y),max=max(df$y))) > > #plot error bars > library(Hmisc) > with(df2,errbar(x,mean,max,min)) > grid(nx=NA,ny=NULL) > > (From: > http://stackoverflow.com/questions/13032777/scatter-plot-with-error-bars) > ______________________________________________ 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.
