# Concise application of a binary function to rows of a (m x 2) matrix

Given the following matrix with weights in ls in the first column and heihts in the second colum:

> wgt.hgt.matrix [,1] [,2] [1,] 180 70 [2,] 156 67 [3,] 128 64 [4,] 118 66 [5,] 202 72

I am looking for a concise way to apply this a binary function like

function(lb, inch) { (lb/inch**2)*703 } -> bmi

to each row of the matrix, resulting in an array, list or vector of with the 5 resulting BMI values. One way I found uses the `apply`

function:

But a splat operator as in Ruby (*) would help making the call more concise and clear:

Does an equivalent to the splat operator exist, i.e. a syntax element telling R to split all vector-like objects to populate argument lists? Are there other, simpler or more concise suggestion for the `apply`

call?