strip function that is able to place the correlation and/or regression coefficient into the strip label.
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more arguments to
The function looks for the specific factor names
c("corr","beta","corr.beta"). If it finds them, it goes up the
calling sequence to locate the data for the panel. Then it calculates
the correlation and/of regression coefficient and inserts the
calculated value(s) as the value for the strip label.
Richard M. Heiberger <email@example.com>