Change value of variable with dplyr

by

We can use replace to change the values in ‘mpg’ to NA that corresponds to cyl==4. 

mtcars %>%
     mutate(mpg=replace(mpg, cyl==4, NA)) %>%
     as.data.frame()

More Related Contents:

  1. Reshape three column data frame to matrix (“long” to “wide” format) [duplicate]
  2. Why does summarize or mutate not work with group_by when I load `plyr` after `dplyr`?
  3. How to select the rows with maximum values in each group with dplyr? [duplicate]
  4. Convert data from long format to wide format with multiple measure columns
  5. Fastest way to add rows for missing time steps?
  6. Unique rows, considering two columns, in R, without order
  7. R spreading multiple columns with tidyr [duplicate]
  8. Applying a function to every row of a table using dplyr?
  9. dplyr summarise: Equivalent of “.drop=FALSE” to keep groups with zero length in output
  10. dplyr: nonstandard column names (white space, punctuation, starts with numbers)
  11. dplyr: “Error in n(): function should not be called directly”
  12. Count number of rows by group using dplyr
  13. dplyr filter with condition on multiple columns
  14. How to strsplit different number of strings in certain column by do function
  15. How to add a cumulative column to an R dataframe using dplyr?
  16. Get last row of each group in R [duplicate]
  17. R – add column that counts sequentially within groups but repeats for duplicates
  18. dplyr – filter by group size
  19. Why is plyr so slow?
  20. Merge rows in a dataframe where the rows are disjoint and contain NAs
  21. Split Data Frame into Rows of Fixed Size
  22. R: Split unbalanced list in data.frame column
  23. mutate_each / summarise_each in dplyr: how do I select certain columns and give new names to mutated columns?
  24. finding close match from data frame 1 in data fame 2
  25. dplyr change many data types
  26. Join two data frames in R based on closest timestamp
  27. How to dplyr rename a column, by column index?
  28. How to add only missing Dates in Dataframe
  29. Override column types when importing data using readr::read_csv() when there are many columns
  30. Adding column if it does not exist

Leave a Comment