gatsoulis / a_little_book_of_python_for_multivariate_analysis Goto Github PK

From email I received.

"""
I found an error in your book on multivariate analysis. The following line in the def pca_summary(pca, standardised_data, out=True): section should be changed to allow zip to be used in creating a dataframe.

pd.DataFrame(zip(a, b, c), index=names, columns=columns) -> pd.DataFrame(list(zip(a, b, c)), index=names, columns=columns)

Thanks for this nice little writeup!
"""

Tried:
As i am a bit new to python not sure why i get this error for my dataset? Please help out

pd.tools.plotting.scatter_matrix(data.loc[:, "V2":"V6"], diagonal="kde")
plt.tight_layout()
plt.show()

Issue:

ValueError Traceback (most recent call last)
in ()
----> 1 pd.tools.plotting.scatter_matrix(data.loc[:, "V10":"V10"], diagonal="kde")
2 #plt.tight_layout()
3 #plt.show()

/home/hs/dl160_bkp/perf_engg/anaconda2/lib/python2.7/site-packages/pandas/tools/plotting.pyc in wrapper(*args, **kwargs)
15 "import 'pandas.plotting.{t}' instead.".format(t=t),
16 FutureWarning, stacklevel=2)
---> 17 return getattr(_plotting, t)(*args, **kwargs)
18 return wrapper
19

/home/hs/dl160_bkp/perf_engg/anaconda2/lib/python2.7/site-packages/pandas/plotting/_misc.pyc in scatter_matrix(frame, alpha, figsize, ax, grid, diagonal, marker, density_kwds, hist_kwds, range_padding, **kwds)
58 naxes = n * n
59 fig, axes = _subplots(naxes=naxes, figsize=figsize, ax=ax,
---> 60 squeeze=False)
61
62 # no gaps between subplots

/home/hs/dl160_bkp/perf_engg/anaconda2/lib/python2.7/site-packages/pandas/plotting/_tools.pyc in _subplots(naxes, sharex, sharey, squeeze, subplot_kw, ax, layout, layout_type, **fig_kw)
236
237 # Create first subplot separately, so we can share it if requested
--> 238 ax0 = fig.add_subplot(nrows, ncols, 1, **subplot_kw)
239
240 if sharex:

/home/hs/dl160_bkp/perf_engg/anaconda2/lib/python2.7/site-packages/matplotlib/figure.pyc in add_subplot(self, *args, **kwargs)
1237 self._axstack.remove(ax)
1238
-> 1239 a = subplot_class_factory(projection_class)(self, *args, **kwargs)
1240 self._axstack.add(key, a)
1241 self.sca(a)

/home/hs/dl160_bkp/perf_engg/anaconda2/lib/python2.7/site-packages/matplotlib/axes/_subplots.pyc in init(self, fig, args, **kwargs)
65 raise ValueError(
66 ("num must be 1 <= num <= {maxn}, not {num}"
---> 67 ).format(maxn=rowscols, num=num))
68 self._subplotspec = GridSpec(
69 rows, cols, figure=self.figure)[int(num) - 1]

ValueError: num must be 1 <= num <= 0, not 1