DT[!(x == .)] and DT[x != .] treat NA in x inconsistently

by

More Related Contents:

  1. Aggregate / summarize multiple variables per group (e.g. sum, mean)
  2. Fastest way to replace NAs in a large data.table
  3. Fastest way to add rows for missing time steps?
  4. Assign multiple columns using := in data.table, by group
  5. How to replace NA values in a table for selected columns
  6. Why is plyr so slow?
  7. Merge rows in a dataframe where the rows are disjoint and contain NAs
  8. Replace logical values (TRUE / FALSE) with numeric (1 / 0)
  9. Cleaning `Inf` values from an R dataframe
  10. write.csv for large data.table
  11. Merge overlapping ranges into unique groups, in dataframe
  12. Convert a data frame to a data.table without copy
  13. What you can do with a data.frame that you can’t with a data.table?
  14. Reshape three column data frame to matrix (“long” to “wide” format) [duplicate]
  15. Combine two data frames by rows (rbind) when they have different sets of columns
  16. How to combine multiple conditions to subset a data-frame using “OR”?
  17. Conditional replacement of values in a data.frame
  18. How to efficiently calculate distance between pair of coordinates using data.table :=
  19. Sample random rows within each group in a data.table
  20. Create categories by comparing a numeric column with a fixed value
  21. Specifying column names in a data.frame changes spaces to “.”
  22. merge data.frames based on year and fill in missing values
  23. Dollar sign before a variable
  24. Rolling Sum by Another Variable in R
  25. R: Replace multiple values in multiple columns of dataframes with NA
  26. Select rows from one data.frame that are not present in a second data.frame
  27. Use of lapply .SD in data.table R
  28. Replace all NA with FALSE in selected columns in R
  29. Convert all data frame character columns to factors
  30. How to use data.table within functions and loops?

Leave a Comment