Returns a data.table of the repeated rows for a given key.
a character vector of column names in
all rows of
dt_data for which the combination of values of
v_s_keys are repeated is returned. Additionally
a new column
rep_count_ is added which indicates the number of times the key combination is repeated in the data set.
If there is no repeated cases function returns
a data.table of all the rows which the combination of the values of
v_s_keys are repeated. See
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