bsxfun: Elementwise Function Application (Matlab Style)

Description

Apply a binary function elementwise.

Usage

bsxfun(func, x, y)
  arrayfun(func, ...)

Arguments

func

function with two or more input parameters.

x, y

two vectors, matrices, or arrays of the same size.

...

list of arrays of the same size.

Value

The result will be a vector or matrix of the same size as x, y.

Details

bsxfun applies element-by-element a binary function to two vectors or matrices of the same size.

arrayfun applies func to each element of the arrays and returns an array of the same size.

Examples

Run this code

X <- matrix(rep(1:10, each = 10), 10, 10)
Y <- t(X)
bsxfun("*", X, Y)  # multiplication table

f <- function(x, y) x[1] * y[1]     # function not vectorized
A <- matrix(c(2, 3, 5, 7), 2, 2)
B <- matrix(c(11, 13, 17, 19), 2, 2)
arrayfun(f, A, B)