[R] Balloon plot scaling problem

[Jim Lemon]

On Sat, 24 May 2014 08:56:59 AM David Winsemius wrote:
> http://stackoverflow.com/questions/20458379/changing-size-of-the-dots-in-a-b
> alloon-plot-and-keeping-zero-values:

Hi David,
I checked this out and it appears to be a solution to the problem of zero 
values becoming invisible when a size transformation is applied to the 
ggplot2 object. While this is a nice solution to the problem posed, it 
doesn't seem to address Kathy's difficulty in emphasizing the differences 
between her closely spaced values. I reinstalled ggplot2, but I couldn't 
work out how to reproduce her plot as the help page for "ggplot2" seems 
to be blank. I had a look at the "stat" and "scale" arguments/functions, 
but was unable to locate anything that allowed the user to specify an 
arbitrary transformation of data values to plot areas. Perhaps someone 
with a better knowledge of ggplot2 can provide an answer.

Jim