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I would like to draw a rectangle to represent the weekend on a plot whose x-axis is time. In an IPython Notebook:
%pylab inlinedt = datetime.datetimedates = [ dt(2015, 1, 1), dt(2015, 1, 2), dt(2015, 1, 3), dt(2015, 1, 4), dt(2015, 1, 5), ]data = [56.0, 53.2, 57.8, 59.1, 55.5]gca().add_patch(Rectangle( xy=(dt(2015, 1, 3), 50.0), width=datetime.timedelta(days=2), height=1.0, ))plot(dates, data)The big problem is that the above code dies with an exception.
AttributeError Traceback (most recent call last)<ipython-input-13-b4545adc3ff2> in <module>() 12 xy=(dt(2015, 1, 3), 50.0), 13 width=datetime.timedelta(days=2),---> 14 height=1.0, 15 )) 16 plot(dates, data).../home/brhodes/.v/misc/lib/python2.7/site-packages/matplotlib/dates.pyc in _to_ordinalf(dt) 202 dt -= delta 203 --> 204 base = float(dt.toordinal()) 205 if hasattr(dt, 'hour'): 206 base += (dt.hour / HOURS_PER_DAY + dt.minute / MINUTES_PER_DAY +AttributeError: 'datetime.timedelta' object has no attribute 'toordinal'The other problem is that my backup plan, of replacing thetimedelta() with the floating-point value 2.0, destroys the date-ness of thex axis. It reverts to being a float that does not display as a date.
Why is atimedelta not a valid increment or offset with which I can express width along a datetime x-axis?
Thanks for any help you can provide!