
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).## S3 method for class 'itemMatrix':
image(x, ...)## S3 method for class 'transactions':
image(x, ...)
## S3 method for class 'tidLists':
image(x, ...)
itemMatrix
, transactions
or
tidLists
).image
in
package image
(in 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)
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