Thanks to reader AHWest for the comment on post 48 Industries Since 1963.
“I think it would be interesting to see the industries ordered by some sort of similarity of returns.”
I think this is a great suggestion, and I would like to see it also. I tried the dendrogram plot technique from Inspirational Stack Overflow Dendrogram Applied to Currencies, but then I spotted the dendrogramGrob in the latticeExtra documentation. This was much easier, and in a couple of lines, we are able to order and connect the 48 industries.