the internal ggplot2 object plus added layers, allowing for extra geoms to be added
Details
This function allows for the projection of clusters in Radviz (for example results of
the SPADE algorithm), where the cluster size is derived from the number of events
that fall into a specific cluster.
If color is not specified the grouping variable is used.
# NOT RUN {data(iris)
das <- c('Sepal.Length','Sepal.Width','Petal.Length','Petal.Width')
S <- make.S(das)
rv <- do.radviz(iris,S)
bubbleRadviz(rv, group='Species')
# }