完成作业X

作业.py

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+import numpy as np
+import matplotlib.pyplot as plt
+
+try:
+    plt.rcParams['font.sans-serif'] = ['SimHei', 'Noto Sans CJK SC', 'WenQuanYi Micro Hei']
+    plt.rcParams['axes.unicode_minus'] = False
+except:
+    pass  
+
+fig, ax = plt.subplots(figsize=(8, 8))
+
+vectors = {
+    'A = [2, 3]': np.array([2, 3]),
+    'B = [4, 1]': np.array([4, 1]),
+    'C = [1, 1]': np.array([1, 1]),
+}
+
+colors = ['red', 'blue', 'green']
+for (name, vec), color in zip(vectors.items(), colors):
+    ax.annotate('', xy=vec, xytext=(0, 0),
+                arrowprops=dict(arrowstyle='->', color=color, lw=2))
+    ax.text(vec[0]+0.1, vec[1]+0.1, name, fontsize=12, color=color)
+
+ax.axhline(y=0, color='black', linewidth=0.5)
+ax.axvline(x=0, color='black', linewidth=0.5)
+
+ax.set_xlim(-0.5, 5.5)
+ax.set_ylim(-0.5, 4)
+ax.set_xlabel('x (abscissa)', fontsize=12)
+ax.set_ylabel('y (ordinate)', fontsize=12)
+ax.set_title('2D Vector Visualization', fontsize=14)
+ax.grid(True, alpha=0.3)
+ax.set_aspect('equal')
+
+plt.show()
+print("Note: Arrows represent vectors. Endpoint of arrow = vector endpoint")