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New posts in data.table
How do I group by a variable and list by a random order in data.table?
Mar 26, 2023
r
permutation
data.table
sample
R: select range of columns in data.table
Mar 25, 2023
r
select
range
data.table
How do I update a single row in each group?
Mar 23, 2023
r
data.table
Use of .N and .SD in one call
Mar 22, 2023
r
data.table
Aggregate only successive rows in data.table
Mar 23, 2023
r
data.table
Nested groupings with data.table
Mar 22, 2023
r
data.table
Aggregating duplicate rows by taking sum
Mar 22, 2023
r
data.table
plyr
data.table aggregation to list column
Mar 22, 2023
r
data.table
dcast renaming all variables to start with a number
Mar 21, 2023
r
data.table
reshape2
ggvis use of " := " in combination with data.table
Mar 21, 2023
r
data.table
ggvis
Subset and join a data frame by matching on nested list in R
Mar 21, 2023
r
dataframe
data.table
dplyr
Utilizing several reference values in a lookup table
Mar 19, 2023
r
data.table
Working with temporary columns (created on-the-fly) more efficiently in a dataframe
Mar 19, 2023
r
data.table
dplyr
How to sum and count on a data.table grouped by values in R
Mar 19, 2023
r
data.table
Why is it faster to evaluate in `j` than with `$` in a `data.table`?
Mar 18, 2023
r
data.table
Issue with filtering data.table for dates - works with fixed date but not with variable
Mar 17, 2023
r
date
data.table
How to delete columns from a data.table based on values in column
Mar 18, 2023
r
data.table
R data.table with variable number of columns
Mar 18, 2023
r
data.table
Filter data.table by quantity of group
Mar 18, 2023
r
data.table
Pivot rows into columns with values of counts for each measurement R
Mar 17, 2023
r
data.table
dplyr
plyr
reshape2
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