All data.table Solutions on Gang of Coders

Total of 67 data.table Solutions

How does one change the levels of a factor column in a data.table

Using .I to return row numbers with data.table package

best way to transpose data.table

When should I use setDT() instead of data.table() to create a data.table?

How to do a data.table merge operation

R Merge data.table

Remove rows conditionally from a data.table in R

How to select columns in data.table using a character vector of certain column names?

Merging multiple data.tables

R Join Merge data.table

Possible to print more than 100 rows of a data.table?

R Printing data.table Options Output Formatting

What is the practical difference between data.frame and data.table in R

Conditionally replacing column values with data.table

Insert a row in a data.table

How do you delete a column by name in data.table?

Understanding exactly when a data.table is a reference to (vs a copy of) another data.table

R Reference Copy data.table Assignment Operator

data.table vs dplyr: can one do something well the other can't or does poorly?

R data.table Dplyr

What does .SD stand for in data.table in R

Replacing NAs with latest non-NA value

R data.table Zoo R Faq

Aggregate / summarize multiple variables per group (e.g. sum, mean)

R Dataframe data.table Aggregate R Faq

Fastest way to replace NAs in a large data.table

R Performance Dataframe data.table

Why were pandas merges in python faster than data.table merges in R in 2012?

Python R Join data.table Pandas

How to delete a row by reference in data.table?

Assign multiple columns using := in data.table, by group

R Dataframe data.table Variable Assignment Colon Equals

Select multiple columns in data.table by their numeric indices

Why is rbindlist "better" than rbind?

R data.table Rbind Rbindlist

How to reorder data.table columns (without copying)

Why does X[Y] join of data.tables not allow a full outer join, or a left join?

R Join data.table

Sort rows in data.table in decreasing order on string key `order(-x,v)` gives error on data.table 1.9.4 or earlier

R String Sorting data.table Key

Convert column classes in data.table

What is the purpose of setting a key in data.table?

Cleaning `Inf` values from an R dataframe

R Dataframe data.table

Pass column name in data.table using variable

Getting the top values by group

R data.table Dplyr

What's the fastest way to merge/join data.frames in R?

Performance R Join Merge data.table

Extract row corresponding to minimum value of a variable by group

R Dplyr data.table Aggregate

Select / assign to data.table when variable names are stored in a character vector

Apply a function to every specified column in a data.table and update by reference

dplyr mutate/replace several columns on a subset of rows

R data.table Dplyr

Split text string in a data.table columns

How to replace NA values in a table for selected columns

R Replace Dataframe data.table Na

Filtering out duplicated/non-unique rows in data.table

R Duplicates data.table

dplyr on data.table, am I really using data.table?

R data.table Dplyr

Use a value from the previous row in an R data.table calculation

When should I use the := operator in data.table?

R data.table Colon Equals

Using data.table package inside my own package

How to get week numbers from dates?

R Date data.table Week Number

Remove multiple columns from data.table

Extract a column from a data.table as a vector, by position

R Vector Indexing data.table

Convert a data frame to a data.table without copy

R Dataframe Reference data.table

How to group data.table by multiple columns?

R Group By data.table

What you can do with a data.frame that you can't with a data.table?

R Dataframe data.table

Error: package or namespace load failed for ggplot2 and for data.table

R Ggplot2 data.table

Add multiple columns to R data.table in one function call?

How to create a lag variable within each group?

R data.table Plyr Dplyr

.EACHI in data.table?

R Performance Group By data.table

Summarizing multiple columns with data.table

Proper/fastest way to reshape a data.table

Subset rows corresponding to max value by group using data.table

R data.table Greatest N-per-Group

Left join using data.table

R Join Merge data.table

Force character vector encoding from "unknown" to "UTF-8" in R

R Utf 8 Character Encoding data.table

How can one work fully generically in data.table in R with column names in variables

R data.table Calculated Columns Programmatically Created

Select subset of columns in data.table R

Why is plyr so slow?

R Dataframe Plyr data.table

write.csv for large data.table

R File Io Csv Dataframe data.table

How to select R data.table rows based on substring match (a la SQL like)

R data.table String Matching

Count number of records and generate row number within each group in a data.table

How to exclude one column from data.table OR convert to data.table to MTS

R data.table Zoo

Sort a data.table fast by Ascending/Descending order

R Performance data.table