Is there a package in R that can do a variability plot? A variability plot is a kind of categorized dot plot. (If there is a lot of data in each category, box plots are used rather than dot plots.) Usually, the categories are factor level combinations. All the dot plots appear in the same window; below the x-axis a hierarchy of factors shows which dot plot corresponds to which factor-level combination.
Examples can be seen http://statsoft.com/support/blog/entryid/64/user-defined-variability-plots/ and http://www.public.iastate.edu/~wrstephe/stat495/GaugeRR_WaferThickness_JMPOutput.pdf By reordering the factor names in the function call, the user can reorder the factor level combinations on the graph, making it easier to do the visual comparisons of interest. The user should also have the option to draw line segments at factor level combination means/medians, and to connect the category means/medians to make visual comparison easier. The only softwares which I am aware of which produce such a plot are Statistica and JMP. I have found these plots to be more powerful than lattice-style categorizations in their ability to allow the user to conveniently process experimental data visually. [[alternative HTML version deleted]] ______________________________________________ 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.
