BUG/CLN: Repeated time-series plot may raise TypeError

[sinhrks]

This repeated time-series plotting works:

import pandas.util.testing as tm
s1 = tm.makeTimeSeries()
s2 = s1[[0, 5, 10, 11, 12, 13, 14, 15]]
ax = s1.plot()
ax2 = s2.plot(style='g')

But if converted to DateFrame, it doesn't:

s1 = s1.to_frame()
s2 = s1.iloc[[0, 5, 10, 11, 12, 13, 14, 15]]
print(s2.index.freq)
ax = s1.plot()
ax2 = s2.plot(style='g', ax=ax)
# TypeError: expected string or buffer

Fixed the problem, and cleaned up the code to merge Series and DataFrame flows.

After the Fix:

import pandas.util.testing as tm
fig, axes = plt.subplots(2, 1)
s1 = tm.makeTimeSeries()
s2 = s1[[0, 5, 10, 11, 12, 13, 14, 15]]
ax = s1.plot(ax=axes[0])
ax2 = s2.plot(style='g', ax=axes[0])

s1 = s1.to_frame(name='x')
s2 = s1.iloc[[0, 5, 10, 11, 12, 13, 14, 15]]
ax = s1.plot(ax=axes[1])
ax2 = s2.plot(style='g', ax=axes[1])

[shoyer]

I would describe this as Bug where repeated plotting of DataFrame with a DatetimeIndex may raise TypeError

[sinhrks]

Thanks, changed the description. Also attached output after the fix on the top.

[shoyer]

awesome, this has bitten me before!

[jreback]

@sinhrks thank you sir!