On 5/13/06, Chris Bergstresser <[EMAIL PROTECTED]> wrote: > Hi all -- > > I'm using trellis to generate bar charts, but there's no built-in > function to generate error bars or confidence intervals, as far as I > can tell. I assumed I could just write my own panel function to add > them, so I searched the archive, and found a posting from the author > of the package stating "... placing multiple bars side by side needs > specialized calculations, which are done within panel.barchart. To add > bars to these, you will need to reproduce those calculations." > Just so I'm clear on this -- there's no capacity to add bars to the > plot, nor to find out the coordinates of the bars in the graphs > themselves. If you want them, you have to completely rewrite > panel.barchart. Is this correct? Are there really so few people > using error bars with bar charts?
I would hope so, since bar charts with error bars are horrible things, in my opinion. Lattice comes with an example of (standard) confidence intervals (new in R 2.3.0) that can be accessed by running library(lattice) demo(intervals) The Hmisc package also has high level interfaces that support confidence intervals (I'm not familiar with the details). -Deepayan ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
