Hi, I am plotting scores for students in a school using a command of the form
qplot(x=Subject, y=Student, data=dataset, geom="point", size=Score) It lists the Subject factors on the x-axis and the Student factors on the y-axis - dots proportional to the Score are plotted at the resultant grid. It works just as I want. However, I want to plot a number of these graphs (eg. datasets from different grades or school years) and want to keep the dot sizes consistent across the various graphs. The default behavior of scale_size() seems to be to train on the given dataset so if the range of scores is different for different datasets then the dot sizes can be inconsistent. For example, assume that the scores for the various subjects can range from 1 to 4. Typically, the scores will have span the entire range but it is not guaranteed. If none of the students in a grade have a score lower than 2 on any of the subjects then the smallest dot size for this grade will correspond to a score of 2 whereas the same dot size will correspond to a score of 1 for the other grades. Is there any way to specify a range to scale_size()? There is an option called "breaks" in scale_size_identity() that does what I want. Is there something similar for scale_size()? Thanks. -Raj. -- View this message in context: http://www.nabble.com/ggplot-scale_size---is-there-any-way-to-specify-breaks--tp19148944p19148944.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.
