Closed
Description
Hi,
I've found an inconsistent behavier for plotting between number coordinate and dates coordiante.
I don't know whether it's easy to fix or it's worthless.
Please see the code below:
Part 1: initialization
from numpy import arange, sin
from matplotlib.pyplot import subplots, show
from matplotlib.dates import num2date
x=arange(0,10,0.1)
t=num2date(x+693596)
y=sin(x)Part 2: plotting in numbers
fig,ax=subplots()
ax.plot(None,None)
ax.plot(x,y)
show()Part 3: plotting in dates
fig,ax=subplots()
ax.plot(None,None)
ax.plot(t,y)
show()Part 1 and Part 2 work well, but Part 3 got error of
matplotlib/dates.py in _to_ordinalf(dt)
195 dt -= delta
196
--> 197 base = float(dt.toordinal())
198 if hasattr(dt, 'hour'):
199 base += (dt.hour / HOURS_PER_DAY + dt.minute / MINUTES_PER_DAY +
AttributeError: 'NoneType' object has no attribute 'toordinal'