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New posts in data.table

Creating new data table based on ifelse on old data table

r if-statement data.table subset

How to add the condition that there is a minimum amount of data to calculate a variable in `data.table`

r data.table

R: Convert obscure table into matrix

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Summarize a data.table with unreliable data

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R data.table: update with shift() does not work as expected

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fread with gunzip: What's the more memory efficient way?

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How to replace column with strings with look-up codes in R

r dataframe data.table str-replace gsub

Using a variable to specify a column name within `data.table`

r data.table

How can I reshape a data.table (long into wide) without doing a function like sum or mean?

r data.table reshape reshape2 splitstackshape

R data.table interval

r data.table posixct

For each `pop` get frequencies of the elements of `id`

r data.table

Conditionally fill column by other columns values

r data.table conditional-statements

How to combine data.table with a loop

r data.table

Speed up vector-lookup for data.table

r data.table

Concatenate values across multiple rows for various IDs in R

r dataframe dplyr data.table

How can I use dcast based on multiple columns?

r data.table reshape data-wrangling dcast

How to select the first n rows of each group in specified columns (after a join)?

r data.table

How can I select rows from table A whose id matches those from table B, but whose (non id) values are different?

r data.table

Grouped count aggregation in R data.table

r count aggregate data.table

Select only first or last value for each unique value in data table?

r data.table
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