260109-test

260109-test/20260109_163430_quadratic_vertex工具GithubCopilot模型gemini-3-pro-preview/plot.py

@@ -0,0 +1,46 @@
+# /// script
+# requires-python = ">=3.11"
+# dependencies = ["numpy", "matplotlib"]
+# ///
+
+import numpy as np
+import matplotlib.pyplot as plt
+
+# 设置字体
+plt.rcParams['font.sans-serif'] = ['WenQuanYi Micro Hei', 'Noto Sans CJK SC', 'Microsoft YaHei', 'SimHei', 'SimSun', 'DejaVu Sans']
+plt.rcParams['axes.unicode_minus'] = False
+
+# 绑定图像尺寸和 DPI
+plt.figure(figsize=(8, 6), dpi=150)
+
+# 定义函数
+def f(x):
+    return -2 * x**2 + 8 * x - 3
+
+# 生成 x 值
+x = np.linspace(-1, 5, 400)
+y = f(x)
+
+# 绘制函数曲线
+plt.plot(x, y, label=r'$y = -2x^2 + 8x - 3$', color='blue')
+
+# 标记顶点 (2, 5)
+vertex_x = 2
+vertex_y = 5
+plt.plot(vertex_x, vertex_y, 'ro', label='顶点 (2, 5)')
+plt.annotate(f'({vertex_x}, {vertex_y})', xy=(vertex_x, vertex_y), xytext=(vertex_x + 0.5, vertex_y),
+             arrowprops=dict(facecolor='black', shrink=0.05))
+
+# 添加坐标轴标签和标题
+plt.xlabel('x')
+plt.ylabel('y')
+plt.title('二次函数 $y = -2x^2 + 8x - 3$ 图像')
+plt.axhline(0, color='black',linewidth=0.5)
+plt.axvline(0, color='black',linewidth=0.5)
+plt.grid(True, linestyle='--', alpha=0.7)
+plt.legend()
+
+# 保存图像
+plt.savefig('figure.png', bbox_inches='tight')
+plt.close()
+print("图像已保存: figure.png")