nice method
Returns nicely rounded domain values.
Implementation
@override
LogScale nice([int count = 10]) {
final d0 = _domain[0];
final d1 = _domain[1];
final l0 = _log(d0);
final l1 = _log(d1);
_domain[0] = _pow(l0.floor().toDouble());
_domain[_domain.length - 1] = _pow(l1.ceil().toDouble());
return this;
}