compute sum

compute.sum( arr[, accessor] )

Computes the sum of an array.

var data = [ 2, 4, 2, 7, 3 ];

var sum = compute.sum( data );
// returns 18

For object arrays, provide an accessor function for accessing array values

var data = [
	[1,2],
	[2,4],
	[3,2],
	[4,7],
	[5,3]
];

function getValue( d ) {
	return d[ 1 ];
}

var sum = compute.sum( data, getValue );
// returns 18