aprioriarules

To create a heatmap in output apriori

I would like also to create a data.frame with the rules in the row and the column items filled in according to 1 or 0.
Example:

            A   B   C   D
A + B + C   1   1   1   0
A + D + C   1   0   1   1

Any suggestions? The idea is to create a heatmap. Thanks a lot!

Solution

  • as(x, "matrix") converts an itemMatrix into a logical matrix. Example:

    data("Adult")
rules <- apriori(Adult, 
  parameter = list(supp = 0.5, conf = 0.9, target = "rules"))
as(items(rules), "matrix")

    items() extracts the LHS and RHS of the rule as a single itemMatrix.

    You can convert the matrix into a data.frame and change it from logical to 0-1 (using storage.mode()).