python rbf插值
时间: 2023-11-03 21:03:24 浏览: 247
在Python中进行Rbf插值可以使用SciPy库中的Rbf函数。具体步骤如下:
1. 导入所需的库:
```python
import numpy as np
from scipy.interpolate import Rbf
import matplotlib.pyplot as plt
```
2. 定义输入数据点:
```python
x = np.array([-1, 0, 2.0, 1.0])
y = np.array([1.0, 0.3, -0.5, 0.8])
```
3. 定义插值函数:
```python
rbf_multiquadric = Rbf(x, y, function='multiquadric')
rbf_gaussian = Rbf(x, y, function='gaussian')
rbf_linear = Rbf(x, y, function='linear')
```
4. 生成加密点:
```python
x_new = np.linspace(-3, 4, 100)
```
5. 进行插值计算:
```python
y_multiquadric = rbf_multiquadric(x_new)
y_gaussian = rbf_gaussian(x_new)
y_linear = rbf_linear(x_new)
```
6. 绘制插值结果图:
```python
plt.plot(x, y, 'bo', label='Data Points')
plt.plot(x_new, y_multiquadric, label='Multiquadric')
plt.plot(x_new, y_gaussian, label='Gaussian')
plt.plot(x_new, y_linear, label='Linear')
plt.legend()
plt.xlabel('x')
plt.ylabel('y')
plt.title('Rbf Interpolation')
plt.show()
```
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