Errors in example plots in documentation

[michaelnt]

This page has exceptions thrown for the some of the examples. I've tried running the example and it works fine so I guess a problem with how the documents were generated.

http://pandas.sourceforge.net/visualization.html#basic-plotting-plot

The following page talks about version 0.4 and this new feature so perhaps it should be updated now that 0.7 has been released.

http://pandas.sourceforge.net/indexing.html#indexing-hierarchical

[lodagro]

Tried also to run first example, gave same error as in documentation though.

In [1]: cpaste
Pasting code; enter '--' alone on the line to stop or use Ctrl-D.
:   import numpy as np
:   np.random.seed(123456)
:   from pandas import *
:   import pandas.util.testing as tm
:   randn = np.random.randn
:   np.set_printoptions(precision=4, suppress=True)
:   import matplotlib.pyplot as plt
:   plt.close('all')
:--

In [2]: ts = Series(randn(1000), index=DateRange('1/1/2000', periods=1000))

In [3]: ts = ts.cumsum()

In [4]: ts.plot()
Out[4]: <matplotlib.axes.AxesSubplot at 0x14446690>

In [5]: df = DataFrame(randn(1000, 4), index=ts.index, columns=['A', 'B', 'C', 'D'])

In [6]: df = df.cumsum()

In [7]: df.plot()
---------------------------------------------------------------------------
Exception                                 Traceback (most recent call last)
<ipython-input-7-4f76bcc16520> in <module>()
----> 1 df.plot()

.../lib/python2.7/site-packages/pandas-0.7.0.dev_195ec30-py2.7-linux-x86_64.egg/pandas/core/frame.pyc in plot(self, subplots, sharex, sharey, use_index, figsize, grid, legend, rot, ax, kind, **kwds)
   3566                     msg = ('Unable to plot data %s vs index %s,\n'
   3567                            'error was: %s' % (str(y), str(x), str(e)))
-> 3568                     raise Exception(msg)
   3569
   3570                 ax.grid(grid)

Exception: Unable to plot data [ -0.2185  -0.7162  -1.2592  -1.8215  -3.5141  -3.6892  -5.3315  -4.7415
 ...
 -15.9591 -16.2024 -16.2647 -18.3865 -18.6017 -18.4403 -19.1776 -19.4117] vs index <class 'pandas.core.daterange.DateRange'>
offset: <1 BusinessDay>, tzinfo: None
[2000-01-03 00:00:00, ..., 2003-10-31 00:00:00]
length: 1000,
error was: Buffer has wrong number of dimensions (expected 1, got 2)

Looks like it is related to the index

In [8]: df = DataFrame(randn(1000, 4), columns=['A', 'B', 'C', 'D'])

In [9]: df = df.cumsum()

In [10]: df.plot()
Out[10]: <matplotlib.axes.AxesSubplot at 0x14dfb750>

In[11]:

[lodagro]

Changing only one line, makes it run fine.

diff --git a/pandas/core/frame.py b/pandas/core/frame.py
index c881553..c5d5b5f 100644
--- a/pandas/core/frame.py
+++ b/pandas/core/frame.py
@@ -3547,7 +3547,7 @@ class DataFrame(NDFrame):

         if kind == 'line':
             if use_index:
-                x = self.index
+                x = np.asarray(self.index)
             else:
                 x = range(len(self))

[wesm]

This got fixed in #635