R

R: dplyr - Sum for group_by multiple columns
· r-2

R: dplyr - Maximum value row in each group
· r-2

R: dplyr - Ordering by count after multiple column group_by
· r-2

R: Refactoring to dplyr
· r-2

R: dplyr - Group by field dynamically ('regroup' is deprecated / no applicable method for 'as.lazy' applied to an object of class "list" )
· r-2

R: Joining multiple data frames
· r-2

R: Converting a named vector to a data frame
· r-2

R: Linear models with the lm function, NA values and Collinearity
· r-2 rstats

R: A first attempt at linear regression
· r-2 rstats

R: Deriving a new data frame column based on containing string
· r-2 rstats