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New posts in data.table

regression by group

r data.table lapply

Why might my non-interactive R session be dispatching a data.table as if it were a data.frame?

r dataframe data.table

fast frequency and percentage table with dplyr

r data.table dplyr

About Error ":= and `:=`(...) are defined for use in j, once only and in particular ways. See help(":=")"

r data.table colon-equals

Summarizing by groups applying function which involves the next group

r dataframe data.table dplyr

R: Checking if a set of variables forms a unique index

r data.table

Working with rich objects in data.table columns

r data.table

sum(.) on a factor column returns incorrect result

r data.table

Subset and replace rows and columns in a data.table

r data.table

Aggregate data table with column names as strings

r data.table

Use `data.table` to get first of subgroup based on a variable

r data.table

average by group, removing current row

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

regex r dataframe data.table apply

Alternative of slower ifelse in R data table

r performance if-statement data.table

Replicate values of column along rows

r data.table

Update values in specified columns based on external data table

r data.table lapply

How to use data.table to efficiently calculate allele frequencies (proportions) by group across multiple columns (loci)

r data.table

Expanding window (cumulative calculation) in data.table: how to improve performance

r performance data.table

Is there a performance advantage to multiple data.table assignments in one statement?

r performance data.table variable-assignment

subseting with grep in data.table - unpredicatble

r data.table
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