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[Bug]: ConciseDateFormatter not showing offset #21670
Description
Bug summary
When I create time series plot with too big time range, I can't see offset in lower right corner.
Code for reproduction
import numpy as np
import pandas as pd
import matplotlib.pyplot as plt
LEN = 40000
dt_index = pd.date_range('2013-01-01 00:00', periods=LEN, freq='5min')
df = pd.DataFrame({'data': np.random.randint(10, size=LEN)},index=dt_index)
fig, ax = plt.subplots()
import matplotlib.dates as mdates
locator = mdates.AutoDateLocator()
formatter = mdates.ConciseDateFormatter(locator)
ax.xaxis.set_major_locator(locator)
ax.xaxis.set_major_formatter(formatter)
ax.plot(df.index, df.data)
plt.show()Actual outcome
Expected outcome
Additional information
When changing time range with fewer points, I can see the offset as seen in expected outcome.
Operating system
Ubuntu
Matplotlib Version
3.4.3
Matplotlib Backend
Qt5Agg
Python version
3.9
Jupyter version
No response
Installation
No response
Activity
jklymak commented on Nov 18, 2021
There is no offset if the year is indicated in the axis somewhere. I think this is expected behaviour.
Stassels commented on Nov 18, 2021
Sorry, I probably didn't wrote it clearly enough.
When I use pan/zoom tool and zoom in to months/days/day, I still can't see the offset. I think that's not expected behavior.
But when I use this example and change LEN to 35000 and then use pan/zoom tool and zoom out, I can see the offset in any zoom level.
dstansby commented on Nov 28, 2021
Thanks for the self contained example; I can reproduce this bug.
jklymak commented on Nov 28, 2021
Thanks both! #21785 should fix this.
Fix ConciseDateFormatter to show year in offset for <12mo plots