python package での zscore

Untitled1.ipynb

zcore.py

import pandas as pd
import numpy as np
import scipy as sp
import seaborn as sns
import matplotlib.pyplot as plt

%matplotlib inline

# pd.stats.misc.zscore AttributeError

df = pd.DataFrame({"n": range(10)})
df = df.assign(
    sp_z=sp.stats.zscore(df["n"]),
    ddof_t_z=(df["n"] - df["n"].mean()) / df["n"].std(),
    ddof_f_z=(df["n"] - df["n"].mean()) / df["n"].std(ddof=False)
)
# degrees of freedom
# http://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.std.html

print(df.min())
print(df.max())

df.plot(subplots=True, figsize=(10, 4), layout=(1, 4))
plt.tight_layout()