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Top Answers
Pass a data.table column name to a function using :=
9 votes
Count Unique Word Matches in Column
6 votes
R data.table cross-join by three variables
6 votes
Create a variable with exclusive conditions in R
5 votes
Sum all pairwise combinations of a vector in R
5 votes
Top Questions
How to predict on a grouped DataFrame, using a dictionary of models, and return to original test DataFrame?
4 votes
1 answers
create row number by group, using python datatable
3 votes
2 answers
How to use the `env` parameter in data.table version 1.14.3
2 votes
1 answers
Change legend trace color independently of actual trace data in plotly r
1 votes
1 answers