Hi, All
I have a data frame as follows:
> data.class(tapes)
[1] "data.frame"
> names(tapes)
[1] "date" "loc" "class" "drp" "data" "scratch"
"reclaim" "total"
Date is a date; loc, class and drp are factors; the rest are numerics.
I want to generate separate plots by date for the numeric variables for
all combinations of the factors. I tried to do this as follows:
> by(tapes,list(loc,class,drp),plot(date,scratch))
Error in FUN(X[[1L]], ...) : could not find function "FUN"
As well as the error I get a single plot for all values of scratch and
date which is meaningless. What am I going wrong here?
For clarification what I want would be done is SAS as something like:
proc gplot;
plot scratch*date;
by loc class drp;
quit; run;
Jim Lane
Capacity Planner
RBC Financial Group
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