Dear all,



my data looks the following:



df <- data.frame (experiment=c("E1","E2","E3","E4"), mean = c(3,4,5,6), stdev=c(0.1,0.1,0.05,0.2), method = c("STD","STD", "FP", "FP"), enzyme =c ("T","T/L","T","T/L"), denaturation=c("U","U","0.05%RG", "0.1%RG"))



I would like to make a bar plot with standard deviation which I solved the following way:



x <- df$experiment
y <- df$mean
sd <- df$stdev



df.plot <- qplot(x,y,xlab="", ylab="# peptides identified")+
  geom_bar(colour="black", fill="darkgrey")+
  geom_errorbar(aes(x=x, ymin=y-sd, ymax=y+sd), width=0.25)

df.plot



However, as the labels for the x-axis (the bars) I do not want the experiment number, as now, but instead a table containing the other columns of my data.frame (method, enzyme, denaturation) with the description in the front and the certain 'value' below the bars.



I am looking forward to your suggestions!



With best wishes,

Nina
______________________________________________

Dr. Nina C. Hubner
scientist quantitative proteomics

Dep. of Molecular Biology, Radboud University Nijmegen, The Netherlands
e-mail: n.hubner@ncmls.ru.nl
tel: +31-24-3613655

Visiting address:
NCMLS, Dept of Molecular Biology (route 274)
Geert Grooteplein 26/28
6525 GA Nijmegen
The Netherlands




The Radboud University Medical Centre is listed in the Commercial Register of the Chamber of Commerce under file number 41055629.


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