r conditionally replicate row in a data frame
6493
Repeat each row of data.frame the number of times specified in a column
96733
Copy table row n times
64725
Calculate row value based on previous and actual row values
151542
How does one reorder columns in a data frame?
45771
Add (insert) a column between two columns in a data.frame
39134
Subset data frame based on number of rows per group
53689
Filtering out duplicated/non-unique rows in data.table
19650
Idiomatic R code for partitioning a vector by an index and performing an operation on that partition
61315
Concatenating a column by a group in R
6158
How to resample in R without repeating permutations?
73700
How do I transpose data in columns to rows?
97533
How to find differences in elements of 2 data frames based on 2 unique identifiers
146977
Subset of a data frame with the penultimate values of one of the columns
89743
Split data.frame based on levels of a factor into new data.frames
24228
How to add a factor column to dataframe based on a conditional statement from another column?
49328
How to automatically insert a blank row after a group of data
58090
Drop unused factor levels in a subsetted data frame