Replacing numbers within a range with a factor [duplicate]

by

Use cut to do this in one step:

dfc <- cut(df$x, breaks=c(0, 15, 45, 56, Inf))
str(dfc)
 Factor w/ 4 levels "(0,15]","(15,45]",..: 3 4 3 2 2 4 2 2 4 4 ...

Once you are satisfied that the breaks are correctly specified, you can then also use the labels argument to relabel the levels:

dfc <- cut(df$x, breaks=c(0, 15, 45, 56, Inf), labels=paste("Age", 1:4, sep=""))
str(dfc)
 Factor w/ 4 levels "Age1","Age2",..: 3 4 3 2 2 4 2 2 4 4 ...

More Related Contents:

  1. Drop unused factor levels in a subsetted data frame
  2. Cleaning up factor levels (collapsing multiple levels/labels)
  3. Coerce multiple columns to factors at once
  4. Confusion between factor levels and factor labels
  5. Colouring plot by factor in R
  6. Plotting with ggplot2: “Error: Discrete value supplied to continuous scale” on categorical y-axis
  7. Why does as.factor return a character when used inside apply?
  8. How to concatenate factors, without them being converted to integer level?
  9. How to change order of boxplots when using ggplot2?
  10. R error “sum not meaningful for factors”
  11. Factors in R: more than an annoyance?
  12. Idiom for ifelse-style recoding for multiple categories
  13. Directly creating dummy variable set in a sparse matrix in R
  14. Create frequency tables for multiple factor columns in R
  15. Imported a csv-dataset to R but the values becomes factors
  16. Concatenate rows of a data frame
  17. Why use as.factor() instead of just factor()
  18. Convert Factor to Date/Time in R
  19. Filter rows which contain a certain string
  20. customize ggplot2 axis labels with different colors
  21. Select every nth row from dataframe
  22. Append data frames together in a for loop
  23. Creating regular 15-minute time-series from irregular time-series
  24. Efficiently computing a linear combination of data.table columns
  25. Rounding numbers in R to specified number of digits
  26. Unlist a data frame by rows, not columns
  27. Applying a function to two lists?
  28. How to remove rows of a matrix by row name, rather than numerical index?
  29. Enclosing variables within for loop
  30. Unable to convert Month-Year string to Date in R

Leave a Comment