function tabulate( N, x, strideX, y, strideY ) {
	var i;
	for ( i = 0; i < N; i++ ) {
		y[ x[ i*strideX ] * strideY ] += 1;
	}
	return y;
}
Creates a frequency table from an input array.

@private
@param {NonNegativeInteger} N - number of indexed elements
@param {Collection} x - input array
@param {integer} strideX - `x` stride length
@param {Float64Array} y - output array
@param {integer} strideY - `y` stride length
@returns {Collection} output array

@example
var arr = [ 0, 1, 1, 0, 0, 2, 3, 5 ];
var out = [ 0, 0, 0, 0, 0, 0, 0, 0 ];

var freq = tabulate( arr.length, arr, 1, out, 1 );
// returns [ 3, 2, 1, 1, 0, 1, 0, 0 ]