[R] summarized data set - how to use an "occurs" field

[mloxton]

David, thanks, I think that should work perfectly
Much obliged

>
>  > dfrm <- expand.grid(A=1:3, B=1:3)
>  > dfrm$counts <- 1:9
>  > xtabs(counts~A, data=dfrm)
> A
>   1  2  3
> 12 15 18
>
>  >barplot(xtabs(counts~A, data=dfrm), xlab="Counts by A level")
>
> --
>
> David Winsemius, MD
> West Hartford, CT
>
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