Split/subset a data frame by factors in one column [duplicate]

by

We could use split:

mylist <- split(df, df$State)

mylist
$AL
  ID Rate State
1  1   24    AL
4  4   34    AL

$FL
  ID Rate State
3  3   46    FL
6  6   99    FL

$MN
  ID Rate State
2  2   35    MN
5  5   78    MN

To access elements number:

mylist[[1]]

or by name:

mylist$AL
  ID Rate State
1  1   24    AL
4  4   34    AL

?split

Description

split divides the data in the vector x into the groups defined by f.
The replacement forms replace values corresponding to such a division.
unsplit reverses the effect of split.

More Related Contents:

  1. Extract rows based on only one column using R [closed]
  2. Filter data.frame rows by a logical condition
  3. Subset data frame based on number of rows per group
  4. Why is `[` better than `subset`?
  5. Selecting data frame rows based on partial string match in a column
  6. Select groups with more than one distinct value
  7. Filtering a data frame on a vector [duplicate]
  8. Remove group from data.frame if at least one group member meets condition
  9. Subset rows in a data frame based on a vector of values
  10. Subsetting R data frame results in mysterious NA rows
  11. Subset of rows containing NA (missing) values in a chosen column of a data frame
  12. Subset with unique cases, based on multiple columns
  13. subset a column in data frame based on another data frame/list
  14. Using multiple criteria in subset function and logical operators
  15. Remove groups with less than three unique observations
  16. Update subset of data.table based on join
  17. dplyr – filter by group size
  18. R gotcha: logical-and operator for combining conditions is & not &&
  19. R keep rows with at least one column greater than value
  20. Subsetting data.table using variables with same name as column
  21. Selecting columns in R data frame based on those *not* in a vector
  22. Subsetting data.table set by date range in R
  23. Subset data.frame by date
  24. Return df with a columns values that occur more than once [duplicate]
  25. How to subset a matrix with different column positions for each row? [duplicate]
  26. Undefined columns selected when subsetting data frame
  27. How to remove rows of a matrix by row name, rather than numerical index?
  28. How to pass “nothing” as an argument to `[` for subsetting?
  29. How to get all possible subsets of a character vector in R?
  30. Filtering rows in R unexpectedly removes NAs when using subset or dplyr::filter

Leave a Comment