zack questions

zack answers

• Fill in missing values in a data.table using the growth rate by category
• Using apply to replace nested for loop
• R / lubridate: Calculate number of overlapping days between two periods
• Remove periods/dots in entire data frame
• Permutations of 3 elements within 6 positions
• Accessing grouping variables in purrr::map() with nested dataframes
• Dot-and-whisker plots of filtered estimates for multiple regression models
• Efficient way to fill column with numbers that identify observations with same value in column [duplicate]
• How to bind two lists with same structure?
• How to flatten / merge overlapping time periods