More Related Contents:
- Aggregate / summarize multiple variables per group (e.g. sum, mean)
- Select / assign to data.table when variable names are stored in a character vector
- Is there a dplyr equivalent to data.table::rleid?
- Assign multiple columns using := in data.table, by group
- Efficient way to rbind data.frames with different columns
- How to replace NA values in a table for selected columns
- data.table “key indices” or “group counter”
- Select subset of columns in data.table R [duplicate]
- How to extract the first n rows per group?
- R: data.table cross-join not working
- Why is allow.cartesian required at times when when joining data.tables with duplicate keys?
- Why is using update on a lm inside a grouped data.table losing its model data?
- Dynamically build call for lookup multiple columns
- Select values from different columns based on a variable containing column names [duplicate]
- ‘Embedded nul in string’ error when importing csv with fread
- Add a row by reference at the end of a data.table object
- How to speed up subset by groups
- R fuzzy string match to return specific column based on matched string
- Subsetting data.table using variables with same name as column
- Subsetting data.table by 2nd column only of a 2 column key, using binary search not vector scan
- Extract a column from a data.table as a vector, by position
- data.table equivalent of tidyr::complete()
- best way to transpose data.table
- := (pass by reference) operator in the data.table package modifies another data table object simultaneously
- Select NA in a data.table in R
- DT[!(x == .)] and DT[x != .] treat NA in x inconsistently
- Keyed lookup on data.table without ‘with’
- Merging two sets of data by data.table roll=’nearest’ function
- assigning by reference into loaded package datasets
- calculating sum of previous 3 rows in R data.table (by grid-square)