chú thích hệ số tương quan cho hàm pairplot seaborn.py

from scipy.stats import pearsonr
import matplotlib.pyplot as plt 

def corrfunc(x, y, dropna=True, ax=None, **kws):
    """Plot the correlation coefficient in the top left hand corner of a plot."""

    if dropna == True:
        x = x.dropna()
        y = y.dropna()
    r, _ = pearsonr(x, y)
    ax = ax or plt.gca()
    ax.annotate(
        f'ρ = {r:.2f}',
        xy=(.05, .9),
        xycoords=ax.transAxes,
        bbox=dict(boxstyle='round,pad=0.2', fc='w', alpha=1)
    )

    
    
#### Cách dùng

df = sns.load_dataset("penguins")
g = sns.pairplot(
	df,
	kind="reg",
    hue="species",
	plot_kws={
        "scatter_kws": {
			"alpha": 0.2
        }
	}
)
g.map_lower(corrfunc)