Bar charts with error bars are far inferior to dot charts and other
types of displays. One of many problems is demonstrated if you draw a
bar chart displaying temperature in F then re-draw it on the degrees C
scale. See http://biostat.mc.vanderbilt.edu/DynamitePlots for much more
information. The error bars lull us into an assumption that symmetric
confidence intervals are OK, among other things.
Frank
--
Frank E Harrell Jr Professor and Chair School of Medicine
Department of Biostatistics Vanderbilt University
______________________________________________
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.