I am using ddply to aggregate my data but haven't found an elegant way to assign column names to the output data frame.
At the moment I am doing this:
agg_data <- ddply(raw_data, .(id, date, classification), nrow)
names(agg_data)[4] <- "no_entries"
and this
agg_data <- ddply(agg_data, .(classification, date), colwise(mean, .(no_entries)) )
names(agg_data)[3] <- "avg_no_entries"
Is there a better, more elegant way to do this?