Cornelis de Gier wrote: > Dear List, > > I'd like to make boxplots of a large number of observations (+/- > 20.000), which are distributed log-normal and right skewed. The > problem is that with standard boxplots a too large number of > observations are displayed as outliers. I also tried to display the > log of the observations, but even then there are to may outliers to my > taste. So I'd like to change the standard IQR box to a box which > displays the 5th tothe 95th percentile instead of the standard 25th to > 75th percentile. > > Is this possible and if so, how? I use both R and Splus, so I'd like > to know for both flavours of S. > > Regards, > > Cornelis
Consider: 1. Adjust the 'range' argument in boxplot() to cover a larger proportion of the data points with the whiskers. 2. Consider using the bpplot() function in Frank Harrell's Hmisc package, which will create box-percentile plots. 3. Use an alternative type of plot, such as a histogram or density plot to present the shape of the distribution. Some examples here: http://addictedtor.free.fr/graphiques/RGraphGallery.php?graph=102 HTH, Marc Schwartz ______________________________________________ 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.
