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New posts in data.table
How to match two data.frames with an inexact matching identifier (one identifier has to be in the range of the other)
Feb 25, 2023
r
data.table
How to reduce a data frame keeping the order for other columns
Feb 23, 2023
r
dataframe
plyr
data.table
R data.table subsetting within a group and splitting a data table into two
Feb 18, 2023
r
data.table
data.table group by with a filter condition [duplicate]
Feb 17, 2023
r
data.table
regression by group
Feb 17, 2023
r
data.table
lapply
Why might my non-interactive R session be dispatching a data.table as if it were a data.frame?
Feb 16, 2023
r
dataframe
data.table
fast frequency and percentage table with dplyr
Feb 16, 2023
r
data.table
dplyr
About Error ":= and `:=`(...) are defined for use in j, once only and in particular ways. See help(":=")"
Feb 16, 2023
r
data.table
colon-equals
Summarizing by groups applying function which involves the next group
Feb 16, 2023
r
dataframe
data.table
dplyr
R: Checking if a set of variables forms a unique index
Feb 16, 2023
r
data.table
Working with rich objects in data.table columns
Feb 15, 2023
r
data.table
sum(.) on a factor column returns incorrect result
Feb 16, 2023
r
data.table
Subset and replace rows and columns in a data.table
Feb 14, 2023
r
data.table
Aggregate data table with column names as strings
Feb 14, 2023
r
data.table
Use `data.table` to get first of subgroup based on a variable
Feb 14, 2023
r
data.table
average by group, removing current row
Feb 13, 2023
r
data.table
Speedy test on R data frame to see if row values in one column are inside another column in the data frame
Feb 12, 2023
regex
r
dataframe
data.table
apply
Alternative of slower ifelse in R data table
Feb 12, 2023
r
performance
if-statement
data.table
Replicate values of column along rows
Feb 12, 2023
r
data.table
Update values in specified columns based on external data table
Feb 11, 2023
r
data.table
lapply
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