No index labels on Dataframe plot with TimedeltaIndex

Code Sample, a copy-pastable example if possible

Download the pickled Example Dataframe, which are basically two sine waves. Then just try to plot it:

import pandas
df = pandas.read_pickle("pd_example")
df.plot()

Problem description

There are no labels at all for the index (x-axis).

Expected Output

A while ago I had labels as “0 days 00:00:xxx.xxxxx”, but it is not the case anymore. Tested on a fresh installation with same results as I have now (no labels).

Output of pd.show_versions()

INSTALLED VERSIONS

commit: None python: 3.6.3.final.0 python-bits: 64 OS: Windows OS-release: 10 machine: AMD64 processor: Intel64 Family 6 Model 158 Stepping 9, GenuineIntel byteorder: little LC_ALL: None LANG: None LOCALE: None.None pandas: 0.21.1 pytest: 3.3.2.dev44+gdb4df583 pip: 9.0.1 setuptools: 38.2.4 Cython: None numpy: 1.13.3 scipy: 1.0.0 pyarrow: None xarray: None IPython: 6.2.1 sphinx: None patsy: None dateutil: 2.6.1 pytz: 2017.2 blosc: None bottleneck: None tables: None numexpr: None feather: None matplotlib: 2.1.1 openpyxl: 1.7.0 xlrd: None xlwt: None xlsxwriter: None lxml: None bs4: None html5lib: 1.0.1 sqlalchemy: None pymysql: None psycopg2: None jinja2: 2.10 s3fs: None fastparquet: None pandas_gbq: None pandas_datareader: None

[eldad-a]

As a (non equivalent) alternative [based on this post]:

import matplotlib, datetime
from matplotlib import pyplot as plt

def timeTicks(x, pos):                                                                                                                                                                                                                                                         
    d = datetime.timedelta(microseconds=x)                                                                                                                                                                                                                         
    return str(d)                                                                                                                                                                                                                                                              

import pandas as pd
df = pd.read_pickle("pd_example")
ax = df.plot()

formatter = matplotlib.ticker.FuncFormatter(timeTicks)                                                                                                                                                                                                                         
ax.xaxis.set_major_formatter(formatter) 
plt.gcf().autofmt_xdate()

[KKostya]

I must add that the whole timdelta index plotting is broken

td_seconds = pd.to_timedelta([0,1,2,10,11,12], unit="s")
df = pd.DataFrame({'a': np.random.randn(len(td_seconds))}, index=td_seconds)
df.plot(marker='o')