R/Shiny Adaptation of Mike Bostock's Amazing Interactive Scatterplot

Another quick example of how we can improve amazing d3 visualizations by adding the power of R and Shiny. I wish that I knew how to fork a Gist into a Github repo to insure that I get no credit for this wonderful visualization.

From the original example's Readme.md:

"The scatterplot matrix visualizations pairwise correlations for multi-dimensional data; each cell in the matrix is a scatterplot. This example uses Anderson's data of iris flowers on the Gaspé Peninsula. Scatterplot matrix design invented by J. A. Hartigan; see also R and GGobi. Data on Iris flowers collected by Edgar Anderson and published by Ronald Fisher."