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New posts in data.table
Subsetting data.table with a condition
Jan 14, 2023
r
data.table
data-manipulation
Merge two data.frames with replacement
Jan 14, 2023
r
join
merge
dataframe
data.table
R: How to make transformations on subset of a subset fast (optimize or alternative to `ddply`)?
Jan 13, 2023
r
data.table
subset
plyr
Use data.table in R to add multiple columns to a data.table with = with only one function call
Jan 13, 2023
r
data.table
combn
First element in a data.table aggregation
Jan 13, 2023
r
data.table
String grouping (aggregation) with data.table (R 3.1.1)
Jan 12, 2023
r
aggregate
data.table
mathematical operations on data.table(in R)
Jan 12, 2023
r
matrix
data.table
Using data.table to calculate a function which depends on many columns
Jan 11, 2023
r
data.table
Return all factor levels by name as new columns from a three column data.table [R]
Jan 10, 2023
r
data.table
dplyr
R passing data.table parameters through function calls
Jan 11, 2023
r
data.table
data.table within group id [duplicate]
Jan 08, 2023
r
data.table
data.table index of a second column
Jan 09, 2023
r
data.table
tidyr wide to long: repeated measures and efficiency
Jan 10, 2023
r
data.table
tidyr
Subset a data.table given the row index for each group
Jan 09, 2023
r
data.table
Tracking full Level change row by row
Jan 08, 2023
r
data.table
dplyr
zoo
Concatenating a vector of column names in R data.table
Jan 07, 2023
r
data.table
Unable to subset (filter) a data frame due to NA's
Jan 08, 2023
r
data.table
dplyr
subset
R Cumulative Sum with a condition and a reset
Jan 05, 2023
r
sum
dplyr
data.table
conditional
Adding a vector as new columns in existing data frame
Jan 05, 2023
r
dataframe
dplyr
data.table
tidyverse
How to parse tab-delimited data (of different formats) into a data.table/data.frame?
Jan 05, 2023
r
parsing
data.table
csv
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