Click here to see the SAS code.
Click here to see the example.


This is a slight variation of the SAS analysis/graph Rick Wicklin
wrote, pertaining to the following "SAS and R" blog:

Rick used sgplot to draw the graph, whereas I use traditional gplot.

Rick's x-axis was the 0-to-1 normalized date value, whereas I convert 
that to an actual date, so the user can see the familiar 'month' 
along th x-axis.

I also add html hover-text to the "current winter" markers.
And you can click on those markers (or the main title) to go to the 
actual data.

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