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New posts in data.table
Mutating multiple columns dynamically while conditioning on specific rows
Apr 05, 2022
r
dplyr
data.table
Splitting a data.table with the by-operator: functions that return numeric values and/or NAs fail
Oct 20, 2022
r
data.table
data.table error when used through knitr, gWidgetsWWW
Dec 15, 2021
r
data.table
knitr
gwidgets
Memory issue with foreach loop in R on Windows 8 (64-bit) (doParallel package)
Sep 23, 2022
r
memory
foreach
data.table
Create nested data.tables by collapsing rows into new data.tables
Apr 25, 2019
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nested
data.table
R - How to run average & max on different data.table columns based on multiple factors & return original colnames
May 17, 2020
r
data.table
aggregate
R row means on multiple columns by groups (or unique IDs)
Nov 17, 2021
r
aggregate
data.table
mean
data.table inner/outer join with NA in join column of type double bug?
Oct 27, 2022
r
inner-join
data.table
outer-join
Update join with multiple rows
Nov 12, 2022
r
data.table
ifelse with data.table
Jul 23, 2021
r
date
if-statement
data.table
"Loop through" data.table to calculate conditional averages
Jul 23, 2021
r
data.table
Conditional (inequality) join in data.table
Jun 20, 2020
r
data.table
R Data.Table Join on Conditionals
Apr 10, 2022
r
data.table
Crosstabs with data.table in R [duplicate]
Sep 13, 2022
r
data.table
crosstab
Summing rows based on specific factor combinations
Aug 30, 2022
r
plyr
data.table
Merge overlapping ranges into unique groups, in dataframe
Mar 02, 2022
r
dataframe
data.table
range
overlap
Subset rows in data.table if all specified columns match a criterion
Mar 04, 2022
r
data.table
Is there a RAM efficient way to calculate the median over a complement set?
Sep 11, 2022
r
data.table
ram
median
data.table() still converts strings to factors?
Nov 15, 2022
r
data.table
Determine when columns of a data.frame change value and return indices of the change
Aug 18, 2017
r
duplicates
dataframe
data.table
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