Untitled

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Across
  1. 3. Objects exported from other packages
  2. 9. Change column order
  3. 14. Arrange rows by column values
  4. 15. Find first non-missing element
  5. 17. Create, modify, and delete columns
  6. 21. Count observations by group
  7. 24. Select grouping variables
  8. 26. Nest join
  9. 27. Subset distinct/unique rows
  10. 28. Group by one or more variables
  11. 29. Do values in a numeric vector fall in specified range?
  12. 30. Compare two numeric vectors
  13. 32. Efficiently count the number of unique values in a set of vector
  14. 34. Recode values
Down
  1. 1. Group input by rows
  2. 2. Summarise each group to fewer rows
  3. 4. Subset rows using their positions
  4. 5. Cumulativate version of all
  5. 6. Vectorised if
  6. 7. Rename columns
  7. 8. Subset columns using their names and types
  8. 10. Subset rows using column values
  9. 11. Convert values to NA
  10. 12. Filtering joins
  11. 13. Mutating join
  12. 16. Apply a function (or a set of functions) to a set of columns
  13. 18. Extract a single column
  14. 19. A helper function for ordering window function output
  15. 20. Compute lagged values
  16. 22. Efficiently bind multiple data frames by row and column
  17. 23. Windowed rank function
  18. 25. A general vectorised if
  19. 31. Descending order
  20. 33. Extract the nth value from a vector