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New posts in data.table
R - Per group computations - data.table and aggregate()
Jun 23, 2026
r
data.table
aggregate
spatial data / compute metrics on neighbors in R
Jun 22, 2026
r
2d
data.table
spatial
data-manipulation
What is exact difference between adressing column by $mycol, [[mycol]] and [, mycol, with=FALSE]?
Jun 21, 2026
r
data.table
Finding rows with sum of a column which is lower than a given value in R
Jun 21, 2026
r
data.table
Are data tables with more than 2^31 rows supported in R with the data table package yet?
Jun 17, 2026
r
merge
data.table
cross-join
apache-arrow
Using group by to get the value corresponding to the max value of another column
Jun 18, 2026
r
dplyr
data.table
grouping
survey
Is there a way to specify the format of dates with fread?
Jun 16, 2026
r
date
data.table
fread
Fast way to split comma-separated strings into (sparse) boolean matrix in R
Jun 17, 2026
r
dplyr
data.table
How to subset multiple rows from data.table fast on big data
Jun 17, 2026
r
data.table
Paste multiple column values with column name
Jun 16, 2026
r
data.table
Using by in a function with data.table
Jun 16, 2026
r
data.table
Filter out values within certain time differences within inconsistent time series dataset
Jun 16, 2026
r
dplyr
time-series
data.table
lubridate
How to meet multi condition with data.table in more graceful way?
Jun 15, 2026
r
data.table
How to bind data tables from lists in nested list?
Jun 14, 2026
r
function
dataframe
data.table
bind
Combine lists into a data.table when length of list elements differs
Jun 15, 2026
r
data.table
How to roll sum by conditon?
Jun 14, 2026
r
data.table
Fill in missing values in a data.table using the growth rate by category
Jun 15, 2026
r
data.table
interpolation
data-manipulation
Subtract exactly one year from a POSIXct object
Jun 15, 2026
r
date
data.table
r data.table::dcast cross product fails on large data set
Jun 15, 2026
r
data.table
reshape
dcast
cross-product
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