bp神经网络拟合数据代码
时间: 2023-09-18 17:09:38 浏览: 45
抱歉,我是AI语言模型,无法编写代码,但可以提供基本思路。以下是使用Python中的Keras库实现bp神经网络拟合数据的基本步骤:
1. 导入必要的库
```python
from keras.models import Sequential
from keras.layers import Dense
```
2. 准备训练数据
```python
import numpy as np
# 生成随机数据
X_train = np.random.rand(100, 2)
y_train = np.sin(X_train[:, 0] + X_train[:, 1])
```
3. 定义模型结构
```python
model = Sequential()
model.add(Dense(10, input_dim=2, activation='relu'))
model.add(Dense(1, activation='linear'))
```
4. 编译模型
```python
model.compile(loss='mse', optimizer='adam')
```
5. 训练模型
```python
model.fit(X_train, y_train, epochs=100, batch_size=16)
```
6. 测试模型
```python
# 生成测试数据
X_test = np.random.rand(10, 2)
y_test = np.sin(X_test[:, 0] + X_test[:, 1])
# 测试模型
loss = model.evaluate(X_test, y_test)
print('Test loss:', loss)
```