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app.py
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import pandas as pd
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import numpy as np
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import joblib
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from xgboost import XGBRegressor
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from sklearn.model_selection import train_test_split
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from sklearn.preprocessing import StandardScaler
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from sklearn.metrics import mean_squared_error, mean_absolute_error, r2_score
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# 1. Veriyi Yükle
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df = pd.read_csv("manufacturing.csv")
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# 2. Özellik ve hedef değişkeni seç
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X = df[["Pressure (kPa)", "Temperature x Pressure", "Material Fusion Metric"]]
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y = df["Quality Rating"]
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# 3. Veriyi eğitim ve test olarak ayır
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X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=42)
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# 4. Veriyi ölçekle
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scaler = StandardScaler()
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X_train_scaled = scaler.fit_transform(X_train)
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X_test_scaled = scaler.transform(X_test)
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# 5. XGBoost modelini eğit
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xgb_model = XGBRegressor()
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xgb_model.fit(X_train_scaled, y_train)
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# 6. Test verisi ile tahmin yap
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y_pred = xgb_model.predict(X_test_scaled)
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# 7. Performans metriklerini yazdır
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print("🔹 Metrikler:")
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print(f" MSE: {mean_squared_error(y_test, y_pred):.2f}")
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print(f" MAE: {mean_absolute_error(y_test, y_pred):.2f}")
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print(f" R² : {r2_score(y_test, y_pred):.2f}")
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# 8. Model ve scaler'ı kaydet
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joblib.dump(xgb_model, "xgb_model.pkl")
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joblib.dump(scaler, "scaler.pkl")
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print("\n✅ Model ve scaler başarıyla kaydedildi.")
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