check the following possible error

[gatsoulis]

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!
"""