Description Usage Arguments Value Examples
Count the numbers of observations within groups
1 |
dt_ |
the data table to uncount |
... |
groups |
na.rm |
should any rows with missingness be removed before the count? Default is |
wt |
the wt assigned to the counts (same number of rows as the data) |
A data.table with counts for each group (or combination of groups)
1 2 3 4 5 6 7 8 9 10 11 |
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