def ticks(self,m=10):
start = self._domain[0]
end = self._domain[-1]
reverse = end < start
_min = float(end if reverse else start)
_max = float(start if reverse else end)
span = _max - _min
# test special degenerate cases
if span == 0 or math.isinf(span):
return _min
step = pv.logFloor(span / m, 10)
err = m / (span / step)
if err <= 0.15: step *= 5
if err <= 0.75: step *= 2
start = math.ceil(_min / step) * step
end = math.floor(_min / step) * step
self._tickFormat = pv.Format.number().fractionDigits( max(0, math.floor(pv.log(step,10) + 0.01)) )
ticks = range(start, end + step, step)
return reversed(ticks) if reverse else ticks
def nice(self):
domain = self.domain()
self.domain( pv.logFloor(domain[0],self._base), pv.logCeil(domain[1],self_base) )
return self