How to deal with a dataframe within a dataframe?
On Tue, May 8, 2012 at 9:19 AM, Robert Latest <boblatest at gmail.com> wrote:
Hello all, I am doing an aggregation where the aggregating function returns not a single numeric value but a vector of two elements using return(c(val1, val2)). I don't know how to access the individual columns of that vector in the resulting dataframe though. How is this done correctly? Thanks, robert
agg <- aggregate(formula=df$value ~ df$quarter + df$tool,
+ ? ? FUN=cp.cpk, lsl=1300, usl=1500)
Try this:
agg <- aggregate(value ~ quarter + tool, df,
FUN=cp.cpk, lsl=1300, usl=1500)
do.call("data.frame", agg)
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