Python鸢尾花数据可视化：散点图绘制Sepal Length与Sepal Width关系

import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
%matplotlib inline  
import warnings
warnings.filterwarnings('ignore')
from sklearn.datasets import load_iris

# 步骤 0：数据收集
data = load_iris()
df = pd.DataFrame(data.data, columns=data.feature_names)
df['target'] = data.target

# 3. 绘制散点图 (scatter)
plt.figure(figsize=(8, 6))
plt.scatter(df['sepal length (cm)'], df['sepal width (cm)'], c=df['target'], cmap='viridis')
plt.title('Sepal Length vs Sepal Width')
plt.xlabel('Sepal Length (cm)')
plt.ylabel('Sepal Width (cm)')
plt.show()