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preda
1999 Mar 07
0
coplot has me stumped
...ariables, and when I
try to specify two sets of given.values, no matter what I do I get the message,
Error: Object "b.levels" not found.
Here is the section of code:
c.ranges <- co.intervals(schses, number=4, overlap=0)
a.ranges <- co.intervals(as.factor(aa94), number=2, overlap=0)
PredAA <- as.factor(aa94)
coplot(Adj.Math.Productivity ~ size94|schses * PredAA, panel=points.lines,
given.values=list(c.ranges, a.ranges ), rows=2, columns=4 )
Instead of 'a.ranges' in the coplot statement, I have also tried c(0,1), and
lots of other variations, but no matter what I do, I alw...