Provides the generic function LIST() and the methods to create a
list representation from objects of the classes itemMatrix,
transactions, and tidLists.
Usage
LIST(from, ...)
# S4 method for class 'itemMatrix'
LIST(from, decode = TRUE)
# S4 method for class 'transactions'
LIST(from, decode = TRUE)
# S4 method for class 'tidLists'
LIST(from, decode = TRUE)Arguments
- from
the object to be converted into a list.
- ...
further arguments.
- decode
a logical controlling whether the items/transactions are decoded from the column numbers internally used by itemMatrix to the names stored in the object
from. The default behavior is to decode.
Details
Using LIST() with decode = TRUE is equivalent to the standard
coercion as(x, "list"). LIST returns the object from
as a list of vectors. Each vector represents one row of the
itemMatrix (e.g., items in a transaction).
See also
Other import/export:
DATAFRAME(),
pmml,
read,
write()
Examples
data(Adult)
### default coercion (same as as(Adult[1:5], "list"))
LIST(Adult[1:5])
#> $`1`
#> [1] "age=Middle-aged" "workclass=State-gov"
#> [3] "education=Bachelors" "marital-status=Never-married"
#> [5] "occupation=Adm-clerical" "relationship=Not-in-family"
#> [7] "race=White" "sex=Male"
#> [9] "capital-gain=Low" "capital-loss=None"
#> [11] "hours-per-week=Full-time" "native-country=United-States"
#> [13] "income=small"
#>
#> $`2`
#> [1] "age=Senior" "workclass=Self-emp-not-inc"
#> [3] "education=Bachelors" "marital-status=Married-civ-spouse"
#> [5] "occupation=Exec-managerial" "relationship=Husband"
#> [7] "race=White" "sex=Male"
#> [9] "capital-gain=None" "capital-loss=None"
#> [11] "hours-per-week=Part-time" "native-country=United-States"
#> [13] "income=small"
#>
#> $`3`
#> [1] "age=Middle-aged" "workclass=Private"
#> [3] "education=HS-grad" "marital-status=Divorced"
#> [5] "occupation=Handlers-cleaners" "relationship=Not-in-family"
#> [7] "race=White" "sex=Male"
#> [9] "capital-gain=None" "capital-loss=None"
#> [11] "hours-per-week=Full-time" "native-country=United-States"
#> [13] "income=small"
#>
#> $`4`
#> [1] "age=Senior" "workclass=Private"
#> [3] "education=11th" "marital-status=Married-civ-spouse"
#> [5] "occupation=Handlers-cleaners" "relationship=Husband"
#> [7] "race=Black" "sex=Male"
#> [9] "capital-gain=None" "capital-loss=None"
#> [11] "hours-per-week=Full-time" "native-country=United-States"
#> [13] "income=small"
#>
#> $`5`
#> [1] "age=Middle-aged" "workclass=Private"
#> [3] "education=Bachelors" "marital-status=Married-civ-spouse"
#> [5] "occupation=Prof-specialty" "relationship=Wife"
#> [7] "race=Black" "sex=Female"
#> [9] "capital-gain=None" "capital-loss=None"
#> [11] "hours-per-week=Full-time" "native-country=Cuba"
#> [13] "income=small"
#>
### coercion without item decoding
LIST(Adult[1:5], decode = FALSE)
#> [[1]]
#> [1] 2 11 26 33 36 51 60 62 64 66 70 111 114
#>
#> [[2]]
#> [1] 3 10 26 31 39 50 60 62 63 66 69 111 114
#>
#> [[3]]
#> [1] 2 8 21 29 41 51 60 62 63 66 70 111 114
#>
#> [[4]]
#> [1] 3 8 19 31 41 50 58 62 63 66 70 111 114
#>
#> [[5]]
#> [1] 2 8 26 31 45 55 58 61 63 66 70 77 114
#>