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")