api-pct-operations function

Array algebra

Addition, subtraction etc. of arrays

a1 %a+% a2

a1 %a-% a2

a1 %a*% a2

a1 %a/% a2

a1 %a/0% a2

tab1 %a_% marg

tab1 %a==% tab2

tab1 %a^% extra

tab1 %aperm% perm

tab1 %aalign% tab2

tab1 %aslice% slice

tab1 %aslice*% slice

tab1 %amarg% marg

Arguments

• tab1, tab2: Multidimensional arrays with named dimnames (we call them 'named arrays').
• marg: A vector of indices or dimnames or a right hand sided formula giving the desired marginal.
• extra: List defining the extra dimensions.
• perm: A vector of indices or dimnames or a right hand sided formula giving the desired permutiation.
• slice: A list of the form name=value.
• a, a1, a2: Arrays (with named dimnames)

Examples

hec <- HairEyeColor
a1 <- tabMarg(hec, c("Hair", "Eye"))
a2 <- tabMarg(hec, c("Hair", "Sex"))
a3 <- tabMarg(hec, c("Eye", "Sex"))

## Binary operations
a1 %a+% a2
a1 %a-% a2
a1 %a*% a2
a1 %a/% a2

Author(s)

Søren Højsgaard, sorenh@math.aau.dk