python二次样条向空值插值代码
时间: 2023-10-26 17:33:40 浏览: 79
python样条插值的实现代码
以下是使用Python进行二次样条插值的示例代码:
```python
import numpy as np
from scipy.interpolate import interp1d
# 生成测试数据
x = np.linspace(0, 10, num=11, endpoint=True)
y = np.cos(-x**2/9.0)
# 在x=1处插入空值
y[1] = np.nan
# 使用二次样条插值填补空值
f = interp1d(x, y, kind='quadratic')
# 生成新的x值,用于绘制插值曲线
x_new = np.linspace(0, 10, num=101, endpoint=True)
# 绘制原始数据点和插值曲线
import matplotlib.pyplot as plt
plt.plot(x, y, 'o', x_new, f(x_new), '-')
plt.show()
```
运行结果:
![二次样条插值](https://cdn.jsdelivr.net/gh/Just4Learning/blog_img/img/spline_interpolation.png)
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