Create an Adjacency Matrix for a set of Rankings
Convert a set of rankings to an adjacency matrix summarising wins and losses between pairs of items.
adjacency(object, weights = NULL, ...)
object |
a |
weights |
an optional vector of weights for the rankings. |
... |
further arguments passed to/from methods. |
For a "rankings" object based on N items, the adjacency matrix is an
N by N matrix, with element (i, j) being the number of times item i wins over
item j. For example, in the ranking \1\ > \3, 4\ > \2\,
item 1 wins over items 2, 3, and 4, and items 3 and 4 win over item 2.
If weights is specified, the values in the adjacency matrix are the
weighted counts.
An N by N matrix, where N is the number of items that can be ranked.
X <- matrix(c(2, 1, 2, 1, 2,
3, 2, 0, 0, 1,
1, 0, 2, 2, 3), nrow = 3, byrow = TRUE)
X <- as.rankings(X)
adjacency(X)
adjacency(X, weights = c(1, 1, 2))Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.