Getting Frequency/Support for Single Items
Provides the generic function itemFrequency
and S4 methods to get the
frequency/support for all single items in an objects based on
itemMatrix
. For example, it is used to get the single
item support from an object of class transactions
without mining.
itemFrequency(x, ...) ## S4 method for signature 'itemMatrix' itemFrequency(x, type, weighted = FALSE)
x |
an object. |
... |
further arguments are passed on. |
type |
a character string specifying
if |
weighted |
should support be weighted by transactions weights stored
as column |
itemFrequency
returns a named numeric vector. Each element is the
frequency/support of the corresponding item in object x
. The items
appear in the vector in the same order as in the binary matrix in x
.
Michael Hahsler
data("Adult") itemFrequency(Adult, type = "relative")
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