[R] barplot

Sepp Gurgel segu at gmx.net
Sat Oct 16 11:51:11 CEST 2004

I have a table with two columns, one with types of blood (A, B, AB or 0) and
one with the factor (negative = -1 or positive = 1).

How can I combine those two columns so that 7 bars are plotted (A, B, AB, 0,
-A, -B and -0)?


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