h.log10(delta));
				let frac = delta / Math.pow(10, exp);

				let niceFrac = round ? (
					frac < 1.5 ?  1 :
					frac < 3   ?  (frac > 2.25 ? 2.5 : 2) :
					frac < 7   ?  5 :
								 10
				) : (
					frac <= 1  ?  1 :
					frac <= 2  ?  2 :
					frac <= 5  ?  5 :
								 10
				);

				return niceFrac * Math.pow(10, exp);
			}

			let data = [
				[0, 1, 2, 3, 4, 5],
				[-5, -2, 1, 7, 9, 13],
				[-123, 4, 29, 37, 217, 230],
				[.5, 0.1, -7, -9, -13, 1],
			//	[7, 8, 9, 10, 11, 12]
			];

			let y