Adam Green wrote: > I am having trouble finding out how to adjust the position of labels on > pie charts. For the small wedges, many of the labels overlap making it > impossible to read. Is there any way to offset the labels so that they > don't overlap? > Hi Adam, There are three ways to adjust the positions of labels on a 3D pie chart (I'm assuming it's 3D from the word "wedges". If not, the following should still be useful).
The first is to change the position of the sectors by the "start" argument. Apart from being useful when very large sectors cause problems, changing the sector positions can sometimes alleviate minor crowding of the labels. The second is to catch the return value of the pie3D function. This is the radial positions at which the labels have been placed. You can then alter this vector and pass it as the argument "labelpos". In this way you can spread out the labels for small sectors. Finally, you can leave out the labels when you call pie3D and manually place labels using the "text" function. The chart is drawn on a plot that spans -1 to 1 in both directions, so it is relatively easy to work out where the labels should be. A word of warning - when I read, "For the small wedges, many of the labels...", I felt that I should say that pie charts in general, and 3D ones in particular, are rarely successful with more than 4 or 5 sectors. In the R-news article that included pie3D, I included a pie chart that was very difficult for the viewer to extract the information that the creator intended. Depending upon what is to be represented, you might consider whether another method might be more successful. Jim ______________________________________________ R-help@stat.math.ethz.ch 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.