sklearn 中皮尔森相关性。

相关性

import pandas as pd
from pandas import set_option
iris=pd.read_csv('data/iris.csv')
set_option('precision',2)# 设置数据的精确度
iris.corr(method='pearson')# 皮尔森相关性

correlations = iris.corr(method='pearson')
names = correlations.columns.tolist()
fig = plt.figure(figsize=(8,8))
ax = fig.add_subplot(111)
cax = ax.matshow(correlations, vmin=-1, vmax=1)
fig.colorbar(cax)
ticks = np.arange(0,4,1)
ax.set_xticks(ticks)
ax.set_yticks(ticks)
ax.set_xticklabels(names)
ax.set_yticklabels(names)
plt.show()