outer {base}

R Documentation

Outer Product of Vectors

Description

The outer product of the vectors x and y is the matrix A with elements A[i, j] = FUN(x[i], y[j], ...). FUN must be a function which expects at least two arguments and which operates elementwise on arrays.

This needs to be extended to taking arrays of arbitrary dimension for x and y and returns an array of dimension c(dim(x), dim(y)).

Usage

outer(x, y, FUN = "*", ...)

Arguments

x	a vector.
y	a vector.
FUN	a function to use on the outer products, it may be a quoted string.
...	optional arguments to be passed to fun.

Examples

outer(1:5, 1:5, "+")

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