R group by aggregate

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More Related Contents:

  1. R transpose and group by
  2. Aggregate / summarize multiple variables per group (e.g. sum, mean)
  3. Collapse / concatenate / aggregate a column to a single comma separated string within each group
  4. Count number of rows within each group
  5. Faster ways to calculate frequencies and cast from long to wide
  6. Aggregating by unique identifier and concatenating related values into a string [duplicate]
  7. Extract row corresponding to minimum value of a variable by group
  8. Group by multiple columns and sum other multiple columns
  9. Add count of unique / distinct values by group to the original data
  10. Select the first and last row by group in a data frame
  11. Select the top N values by group
  12. Apply function conditionally
  13. Aggregate multiple columns at once [duplicate]
  14. Aggregate a dataframe on a given column and display another column
  15. Aggregate a data frame based on unordered pairs of columns
  16. Compute mean and standard deviation by group for multiple variables in a data.frame
  17. aggregate methods treat missing values (NA) differently
  18. Group integer vector into consecutive runs
  19. dplyr issues when using group_by(multiple variables)
  20. Returning first row of group
  21. Get the means of sub groups of means in R
  22. Apply several summary functions (sum, mean, etc.) on several variables by group in one call
  23. Aggregate data in R
  24. How to group data.table by multiple columns?
  25. How to group by two columns in R
  26. R use ddply or aggregate
  27. Run a custom function on a data frame in R, by group
  28. Aggregating all unique values of each column of data frame
  29. use rollapply and zoo to calculate rolling average of a column of variables
  30. How can I count the number of NAs per group?

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