FrictradeLearning.py Stoploss auto et gestion steps de mises adjust
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tools/sklearn/.ipynb_checkpoints/Sinus-checkpoint.py
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tools/sklearn/.ipynb_checkpoints/Sinus-checkpoint.py
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import numpy as np
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import matplotlib.pyplot as plt
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from lightgbm import LGBMRegressor
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# === Données non linéaires ===
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np.random.seed(0)
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X = np.linspace(0, 10, 200).reshape(-1, 1)
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y = np.sin(X).ravel() + np.random.normal(0, 0.1, X.shape[0]) # sinusoïde + bruit
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# === Entraînement du modèle ===
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model = LGBMRegressor(
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n_estimators=300, # nombre d’arbres
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learning_rate=0.05, # taux d’apprentissage (plus petit = plus lisse)
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max_depth=5 # profondeur des arbres (plus grand = plus complexe)
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)
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model.fit(X, y)
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# === Prédiction ===
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X_test = np.linspace(0, 10, 500).reshape(-1, 1)
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y_pred = model.predict(X_test)
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# === Visualisation ===
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plt.figure(figsize=(10, 5))
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plt.scatter(X, y, color="lightgray", label="Données réelles (sin + bruit)", s=20)
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plt.plot(X_test, np.sin(X_test), color="green", linestyle="--", label="sin(x) réel")
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plt.plot(X_test, y_pred, color="red", label="Prédiction LGBM")
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plt.title("Approximation non linéaire avec LGBMRegressor")
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plt.xlabel("x")
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plt.ylabel("y")
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plt.legend()
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plt.grid(True)
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plt.show()
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