Split a string column into several dummy variables

Related Contents:

  1. Split comma-separated strings in a column into separate rows
  2. Split data frame string column into multiple columns
  3. Creating dummy variables in R data.table
  4. R split string by symbol
  5. Aggregate / summarize multiple variables per group (e.g. sum, mean)
  6. Understanding exactly when a data.table is a reference to (vs a copy of) another data.table
  7. data.table vs dplyr: can one do something well the other can’t or does poorly?
  8. dcast warning: ‘Aggregation function missing: defaulting to length’
  9. Concatenate a vector of strings/character
  10. Split character column into several binary (0/1) columns
  11. Selecting data frame rows based on partial string match in a column
  12. Left join using data.table
  13. What is the purpose of setting a key in data.table?
  14. Using data.table package inside my own package
  15. Assign multiple columns using := in data.table, by group
  16. How to get week numbers from dates?
  17. Count the number of all words in a string
  18. Delete rows containing specific strings in R
  19. Pass column name in data.table using variable [duplicate]
  20. Sample random rows within each group in a data.table
  21. Split dataframe into multiple output files
  22. Remove part of a string
  23. How to extract the first n rows per group?
  24. Deleting reversed duplicates with R
  25. What is the algorithm behind R core’s `split` function?
  26. Split data.frame by value
  27. data.table with two string columns of set elements, extract unique rows with each row unsorted
  28. Convert column classes in data.table
  29. When should I use the := operator in data.table?
  30. Force character vector encoding from “unknown” to “UTF-8” in R
  31. Error: package or namespace load failed for ggplot2 and for data.table
  32. Evaluating both column name and the target value within `j` expression within `data.table`
  33. Why is allow.cartesian required at times when when joining data.tables with duplicate keys?
  34. Fill in missing values by group in data.table
  35. subsetting a data.table using != excludes NA too
  36. Why is plyr so slow?
  37. Referring to data.table columns by names saved in variables
  38. data.table and parallel computing
  39. Update subset of data.table based on join
  40. Using setDT inside a function
  41. How subset a data frame by a factor and repeat a plot for each subset?
  42. Merging multiple data.tables
  43. Splitting a file name into name,extension
  44. Join R data.tables where key values are not exactly equal–combine rows with closest times
  45. how to show a legend on dual y-axis ggplot
  46. How can I evaluate (or create) an on the fly column in data.table in r
  47. Cleaning `Inf` values from an R dataframe
  48. When should I use setDT() instead of data.table() to create a data.table?
  49. Raw text strings for file paths in R
  50. can the value.var in dcast be a list or have multiple value variables?

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