回答編集履歴
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test
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恒常関数の場合、何段重ねても線形写像しか作れないことになります。
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---
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```python
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import numpy as np
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import matplotlib.pyplot as plt
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from sklearn.neural_network import MLPRegressor
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X = np.linspace(0, 2*np.pi, num=100).reshape(-1, 1)
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y = np.sin(X).ravel()
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plt.plot(X.ravel(), y, label="true")
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for hls in [(25, ), (50, ), (25, 25), (50, 50)]:
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mlp = MLPRegressor(hidden_layer_sizes=hls, activation="relu",
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max_iter=2000)
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mlp.fit(X, y)
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y_pred = mlp.predict(X)
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plt.plot(X.ravel(), y_pred, label=f"pred hidden_layer_sizes:{hls}")
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plt.legend()
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plt.show()
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```
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