Cross-tabulate joint occurrences across pairs of items
Provides the generic function crossTable and the S4 method to
cross-tabulate joint occurrences across pairs of items.
crossTable(x, ...)
## S4 method for signature 'itemMatrix'
crossTable(x, measure = c("count", "support", "probability",
"lift", "chiSquared"), sort = FALSE)x |
object to be cross-tabulated
( |
measure |
measure to return. Default is co-occurence counts. |
sort |
sort the items by support. |
... |
aditional arguments. |
A symmetric matrix of n time n, where n is the number of items times
in x. The matrix contains the co-occurrence counts between pairs of
items.
Michael Hahsler
data("Groceries")
ct <- crossTable(Groceries, sort=TRUE)
ct[1:5, 1:5]
sp <- crossTable(Groceries, measure="support", sort=TRUE)
sp[1:5,1:5]
lift <- crossTable(Groceries, measure="lift", sort=TRUE)
lift[1:5,1:5]
chi2 <- crossTable(Groceries, measure="chiSquared", sort=TRUE)
chi2[1:5,1:5]Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.