api-cell: Table cell operations.

In gRbase: A Package for Graphical Modelling in R

Table cell operations.

Description

Low level table cell operations.

Usage

cell2entry(cell, dim)

entry2cell(entry, dim)

next_cell(cell, dim)

next_cell2(cell, dim)

next_cell_slice(cell, dim, slice_marg)

slice2entry(slice_cell, slice_marg, dim)

cell2entry_perm(cell, dim, perm)

perm_cell_entries(perm, dim)

fact_grid(dim, slice_cell = NULL, slice_marg = NULL)

Arguments

cell	Vector giving the cell, e.g. c(1, 1, 2) in 3-way table.
dim	Vector giving array dimension, eg c(2, 2, 2).
entry	An entry in an array (a number indexing a vector).
slice_marg	Vector giving the margin of a table, eg. c(2, 3)
slice_cell	Vector giving the corresponding cell of marginal table, e.g. c(1, 2)
perm	Vector giving permutaion of array, eg. c(1, 3, 2).

Examples

di <- c(2, 2, 3)

cell2entry(c(1, 1, 1), dim=di)
cell2entry(c(2, 2, 3), dim=di)

entry2cell(1, dim=di)
entry2cell(12, dim=di)

next_cell(c(1, 1, 1), dim=di)
next_cell(c(2, 1, 1), dim=di)

## The first two entries are kept fixed
next_cell_slice(c(2, 1, 1), dim=di, slice_marg=c(1, 2))
next_cell_slice(c(2, 1, 2), dim=di, slice_marg=c(1, 2))

## Cell (2, 2, 1) corresponds to entry 4
cell2entry(c(2, 2, 1), dim=di)
## Same as
cell2entry_perm(c(2, 2, 1), dim=di, perm=c(1, 2, 3))
## If the table dimensions are permuted as (3, 1, 2)
## the entry becomes
cell2entry_perm(c(2, 2, 1), dim=di, perm=c(3, 1, 2))

gRbase documentation built on Oct. 22, 2024, 5:06 p.m.