Index tables are percentages of percentages. They take the percentage from
prop.table(cube, margin) and, by default, divide that by the proportions of
the other margin. The baseline argument can be used to provide baseline
proportions to compare against.
index.table(x, margin, baseline)A CrunchCube to calculate index table for
which margin to index against (1 for rows, 2 for columns)
an arbitrary set of proportions to compare the table given in
x to. Useful for comparing two separate cubes. baseline must have the
same length as the extent of the dimension given in margin.
an array of percentages indexed to the margin provided
index.table() is only implemented for 2 dimensional cubes. If you need to
calculate indexes for a higher dimension Cube, please slice the cube first.
if (FALSE) {
cube_object
# v7
# v4 C E
# B 5 2
# C 5 3
index.table(cube_object, 1)
# v7
# v4 C E
# B 107.1429 85.71429
# C 93.7500 112.50000
index.table(cube_object, 2)
# v7
# v4 C E
# B 100 80
# C 100 120
index.table(cube_object, 2, c(0.6, 0.4))
# v7
# v4 C E
# B 83.33333 66.66667
# C 125.00000 150.00000
}