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data.table
Getting started with data.table
Adding and modifying columns
Cleaning data
Computing summary statistics
Creating a data.table
Joins and merges
Reshaping, stacking and splitting
Subsetting rows by group
Using .SD and .SDcols for the subset of data
Using keys and indices
Using list columns to store data
Why is my old code not working?
unique and duplicated no longer works on keyed data.table
data.table
Getting started with data.table
Adding and modifying columns
Cleaning data
Computing summary statistics
Creating a data.table
Joins and merges
Reshaping, stacking and splitting
Subsetting rows by group
Using .SD and .SDcols for the subset of data
Using keys and indices
Using list columns to store data
Why is my old code not working?
unique and duplicated no longer works on keyed data.table
data.table
Why is my old code not working?
Introduction
The data.table package has undergone a number of changes and innovations over time. Here are some potential pitfalls that can help users looking at legacy code or reviewing old blog posts.
Why is my old code not working? Related Examples
unique and duplicated no longer works on keyed data.table
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