R data.table select set of columns for maximum value based on group

R using data.table to calculate a column dependent on previous rows

Applying a command in each instance where any of several columns takes a set range of values

Match Specific Column and Merge [ Different Length DF]

Iteratively generate results for all different combinatiosn for a vector

How to efficiently check whether the identity of R list elements if these are vectors?

Creating a new column with more rows in a data table

How to transform a data.table into a list of columns that change per ID

Multiple one column by many others with data table

Assign a value of 1 to all positive counts across several columns in R

Separate string after last underscore

Using rle to eliminate first and last sequences

Subset a data frame based on specified condition on Slot Column

How to compare multiple string lengths between columns with an R data.table?

Find the duration of overlap between pairs of timestamps using data.table

R data.table create new columns with standard names

Join only those columns that are non-NA

Transforming columns of data.table based on other data.table

Display Factor Variable Data into Table

Difference between gather, reshape, cast, etc

first lag in multiple columns

Select from data table as list in R

R data.table: Run functions across custom - non-distinct subsets

Install package data.table on EC2 instance

data.table package in R 3.5 does not install

Working with data.tables within data.tables

R Is Concurrent Modify to Large Data.Table or dataframe acceptable?

Efficient way to subset rows in R for dataset with 10^7 columns

R: Parallel and data.table Error in unserialize(node$con) : error reading from connection

select best indices from the result of ensemble using mRMR

error in .tbl_df unused arguments in RStudio

R data.table column that counts along unique values in other column

Replace all values greater than 0 with 1 in data frame efficiently

parsing list string vector to multiple column data.table

R data table: Assign a value to column based on reference column

R data.table apply increasing values to specific row indices

Issue with getting column names

Convert list to data.table efficiently

r delete columns in a data table when you have a list of columns to keep

Aggregation and typing inconsistency in `data.table`

drop=FALSE does not work for geom_tile when I have some 0 counts for some intervals

Programmatic renaming of columns after reshaping in R

Merge rows by "Key" column for a large data table in R (more than 30 million rows)

R data.table to lookup and match values

Merging Overlapping Intervals in R

Looping over different column names to condition rows in data table

use a data.table variable as a function parameter on a nested list

R data.table randomly pops out historical warnings

setkey on "copied" data.frame affects origin

Week Range Output in R

Best way to add columns to a data table based on a Date Class original column

Obtain column names as vector in R

Carry / use value from previous group

Cleaning up factor levels in data table with .SD and lapply

data.table filter on column1 %like% column2

Ranking in data.table with multiple criteria

data.table: fast calculate statistics of rows time within bidirectional time moving window

Select columns in data table in R

Piecewise interpolation for entire data.frame R

Faster aggregate multiple columns

frequency of each row in data.table for a specific column

Match records immediately before and after time range

User-Defined function with data table aggregation

User-Defined Function in R with aggregation

Cumsum with conditions in R

Function to calculate cumsum for multiple conditions

Count nr of duplicate records in row in datatable

Writing a R function with aggregation using data.table

Writing R function include data.table

R data.table Subgroup counts and weighted percent of group summary

Assign day of the day year to a month

R data table: pad out rows with CJ but keep NA rows

Naming Aggregate variable(s) in data.table by reference in R

Fast way to measure how many nodes are neighbors in a graph matrix

Summing of lookups in other data.table too slow

Extract rows of data.table according to rows of another data.table

calculating followup per id

How to check corresponding values among two or more columns accordingly to another in R

Group several columns of a dataframe in two different column groups

Weighted Pearson's Correlation with one Object in R

How to use dcast() to stack/collapse string column by group

Insert new rows in dataframe with conditions

Creating Subset of data table in R based on another column condition

Using proportion as the aggregate function in Data.Table's dcast

how to merge? or fill? data by key with ratio in r data.table

dcast (data.table) error, attempts aggregation with no duplicates

R sum by group if date within date range

How to define a keyed (grouped) join in data table?

What does "data.table" "data.frame" class mean?

R Shiny: How do I unbold the column names and reduce the font size of the column names with renderTable

How to calculate all possible combinations of distance and time differences between grouped rows of data in R?

difference between a numeric variable and many others

R - reading multiple data files at once

Does the R library "ModelMetrics" rmse function not work with data.table types?

R: Aggregate data table with different functions in one step

Creating a vector from data.table row without using apply

Many levels rows summing in datatable

Pivot / Dcast using sparse matrix with character values

test.data.table errors R

data.table gives the error: "logical error. i is not a data.table, but 'on' argument is provided"