Changed text cex back to 1.0

After squinting, it looks like cex being 1.0 is most correct.  Added
important explanatory comments.  Corrected x-axis.
Clean up, and add comments

Added explanatory comments.  Corrected X-axis.  Removed unnecessary
comments.
Clean up

Added explanatory comments, and removed others.
Added comments

Explanatory comments added.  Clean up.