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68 lines
2.2 KiB
Python
68 lines
2.2 KiB
Python
import xgboost as xgb
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import pandas as pd
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import os
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from sklearn.metrics import r2_score
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from sklearn.model_selection import train_test_split
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import matplotlib as mpl
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import matplotlib.pyplot as plt
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mpl.rcParams['font.sans-serif']=['kaiti']
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pd.set_option('display.width',None)
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df = pd.read_excel(r'C:\Users\鸽子\Desktop\入模数据\嘉兴数据.xlsx')
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df['dtdate'] = pd.to_datetime(df['dtdate'],format='%Y-%m-%d').astype('string')
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df.set_index('dtdate',inplace=True)
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plt.plot(range(len(df)),df['售电量'])
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plt.show()
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print(df.head())
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df_eval = df[df.index.str[:7]=='2023-08']
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# df_train = df[(df.index.str[:7]!='2023-08')&(df.index.str[:7]!='2023-09')]
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df_train = df[500:850]
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print(len(df_eval),len(df_train),len(df))
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df_train = df_train[['tem_max','tem_min','holiday','24ST','rh','prs','售电量']]
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# IQR = df['售电量'].describe()['75%'] - df['售电量'].describe()['25%']
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# high = df['售电量'].describe()['75%'] + 1.5*IQR
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# low = df['售电量'].describe()['25%'] - 1.5*IQR
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# print('异常值数量：',len(df[(df['售电量'] >= high) | (df['售电量'] <= low)]))
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#
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# df_train = df_train[(df['售电量'] <= high) & (df['售电量'] >= low)]
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X = df_train[['tem_max','tem_min','holiday','24ST','rh','prs']]
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X_eval = df_eval[['tem_max','tem_min','holiday','24ST','rh','prs']]
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y = df_train['售电量']
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x_train,x_test,y_train,y_test = train_test_split(X,y,test_size=0.1,random_state=42)
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model = xgb.XGBRegressor(max_depth=6, learning_rate=0.05, n_estimators=150)
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model.fit(x_train,y_train)
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y_pred = model.predict(x_test)
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result_test = pd.DataFrame({'test':y_test,'pred':y_pred},index=y_test.index)
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# 指标打印
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print(abs(y_test - y_pred).mean() / y_test.mean())
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eval_pred = model.predict(X_eval)
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result_eval = pd.DataFrame({'eval':df_eval['售电量'],'pred':eval_pred},index=df_eval['售电量'].index)
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print(result_eval)
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print((result_eval['eval'].sum()-result_eval['pred'].sum())/result_eval['eval'].sum())
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print((result_eval['eval'].sum()-(result_eval['eval'][:-3].sum()+result_eval['pred'][-3:].sum()))/result_eval['eval'].sum())
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result_eval.to_csv(r'C:\Users\鸽子\Desktop\各地市日电量预测结果\嘉兴.csv')
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# 保存模型
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model.save_model('jiaxing.bin')
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loaded_model = xgb.XGBRegressor()
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loaded_model.load_model('jiaxing.bin')
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model.predict(X_eval)
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