api_tabSlice function

Array slices

Functions for extracting slices of arrays

tabSlice(
  tab,
  slice = NULL,
  margin = names(slice),
  drop = TRUE,
  as.array = FALSE
)

tabSlice2(tab, slice, margin.idx, drop = TRUE, as.array = FALSE)

tabSlicePrim(tab, slice, drop = TRUE)

tabSliceMult(tab, slice, val = 1, comp = 0)

tabSlice2Entries(tab, slice, complement = FALSE)

Arguments

• tab: An array with named dimnames.
• slice: A list defining the slice.
• margin: Names of variables in slice.
• drop: If TRUE then dimensions with only one level will be dropped from the output.
• as.array: If the resulting array is one-dimensional the result will by default be a vector with no dim attribute unless as.array is TRUE.
• margin.idx: Indec of variables in slice.
• val: The values that entries in the slice will be multiplied with.
• comp: The values that entries NOT in the slice will be multiplied with.
• complement: If TRUE the complement of the entries are returned.

Examples

x = HairEyeColor
s = list(Hair=c("Black", "Brown"), Eye=c("Brown", "Blue"))

s1 = tabSlice(x, slice=s); s1

tabSlice2Entries(x, slice=s)
tabSlice2Entries(x, slice=s, complement=TRUE)

## tabSliceMult 
s2 = tabSliceMult(x, slice=s); s2

sp = list(c(1,2), c(1,2), TRUE)
tabSlicePrim(x, slice=sp)
tabSlice(x, slice=s)

Author(s)

Søren Højsgaard, sorenh@math.aau.dk