| image {arules} | R Documentation |
Provides the S4 methods image to
generate level plots to
visually inspect
binary incidence matrices, i.e.,
objects based on itemMatrix
(e.g., transactions, tidLists, items in itemsets or rhs/lhs in rules).
These plots can be used to identify problems in a data set
(e.g., recording problems with some transactions containing all items).
## S4 method for signature 'itemMatrix': image(x, ...) ## S4 method for signature 'transactions': image(x, ...) ## S4 method for signature 'tidLists': image(x, ...)
x |
the object (itemMatrix, transactions or
tidLists). |
... |
further arguments passed on to image in
package Matrix which in turn are passed on to
levelplot in lattice. |
image (for dgTMatrix in Matrix),
levelplot (in lattice),
itemMatrix-class,
transactions-class,
tidLists-class
data("Epub")
# in this data set we can see that not all
# items were available from the beginning.
image(Epub[1:1000])