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5-1 逻辑回归代码(含warning解释)

發布時間:2023/12/20 编程问答 29 豆豆
生活随笔 收集整理的這篇文章主要介紹了 5-1 逻辑回归代码(含warning解释) 小編覺得挺不錯的,現在分享給大家,幫大家做個參考.

#-*- coding: utf-8 -*-

#邏輯回歸 自動建模 import pandas as pd#參數初始化 filename = '../data/bankloan.xls' data = pd.read_excel(filename) x = data.iloc[:,:8].as_matrix() y = data.iloc[:,8].as_matrix() from sklearn.linear_model import LogisticRegression as LR from sklearn.linear_model import RandomizedLogisticRegression as RLR rlr = RLR() #建立隨機邏輯回歸模型,篩選變量 rlr.fit(x, y) #訓練模型 rlr.get_support() #獲取特征篩選結果,也可以通過.scores_方法獲取各個特征的分數 print(u'通過隨機邏輯回歸模型篩選特征結束。') print(u'有效特征為:%s' % ','.join(data.columns[rlr.get_support()])) x = data[data.columns[rlr.get_support()]].as_matrix() #篩選好特征lr = LR() #建立邏輯貨柜模型 lr.fit(x, y) #用篩選后的特征數據來訓練模型 print(u'邏輯回歸模型訓練結束。') print(u'模型的平均正確率為:%s' % lr.score(x, y)) #給出模型的平均正確率,本例為81.4%
python 3.5.2下運行,

如果

把書上的x = data.iloc[:,:8].as_matrix()

x = data.iloc[:,:9].as_matrix(),可以消除warning,但是結果會錯誤。

上述代碼原封不動的情況下,運行后會出現如下警告

isibleDeprecationWarning: boolean index did not match indexed array along dimension 0; dimension is 9 but corresponding boolean dimension is 8

這個意思是excel中的數據少讀了一列,可以不予理會。



數據集(bankloan.xls):

年齡教育工齡地址收入負債率信用卡負債其他負債違約
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2725625.006.800.710.990
2814719.004.100.290.490
481172266.003.201.470.640
2412518.006.000.530.550
31161233.004.200.151.240
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5123114249.007.804.2715.150
2214319.0023.101.892.501
37161031.0011.701.701.931
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49221320.0016.900.383.001
2919830.008.200.152.310
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3429727.001.700.300.160
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34116948.007.601.472.170
26110232.004.700.131.380
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413121186.0026.504.9917.801
3210420.003.000.260.341
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32212363.0018.205.555.920
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401212146.006.200.971.890
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33210426.003.100.030.780
39291232.006.601.430.680
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36211849.001.300.270.360
2937284.0013.606.914.511
484141059.0016.504.944.801
383121864.005.800.892.820
46292615.004.300.010.630
2735442.0019.902.715.651
5411834114.008.503.296.400
2740025.0012.701.421.761
2311017.001.600.010.260
41123291.0013.700.5711.890
2413515.0011.300.071.621
2819022.0027.705.280.811
2610014.0010.500.261.210
2418017.005.600.570.381
49222479.007.300.295.480
2823136.008.600.382.710
38161718.0013.000.132.210
3322937.004.500.830.830
2618425.004.700.210.960
3619140.009.801.981.940
373161450.0036.607.3210.981
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45117062.0015.002.446.860
3719857.005.501.361.780
2923626.006.100.541.051
51110144.0013.204.960.851
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30471030.0015.700.264.450
3117220.0012.300.112.350
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351101639.005.700.222.010
2541134.008.500.132.761
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2823441.0025.105.904.391
46341773.005.402.221.720
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42211573.006.802.872.090
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2613529.0025.702.534.931
471278113.009.202.388.020
2911318.0025.601.982.631
34131436.004.700.621.070
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41241426.0019.201.473.521
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2820330.004.800.121.321
2926718.005.100.450.471
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2916446.005.401.171.310
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471319136.0023.1014.2317.181
2311021.008.401.210.551
37312883.004.100.323.080
4112415100.0011.505.066.440
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4126119.006.300.121.070
36171740.009.901.692.270
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3126525.0011.502.330.540
2825625.002.900.340.390
481282570.0012.004.334.070
2320142.003.901.020.621
31111634.006.800.302.010
2716643.004.900.881.220
431111737.001.300.180.300
2925728.0018.702.133.110
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3814919.0013.601.251.340
301121038.008.500.173.060
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36111233.0032.501.279.460
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31112924.006.600.441.140
351161057.0010.501.144.840
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4012328.007.100.181.800
37201331.000.900.120.161
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381111335.008.001.271.530
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3416120.001.200.040.200
3510534.0011.101.372.401
2424420.003.700.320.420
481308101.006.401.874.590
2628140.0011.800.444.280
4016936.002.100.390.371
3419848.009.300.424.040
35117442.003.000.091.170
3017233.0025.401.177.221
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36411730.0011.500.323.130
2111116.006.300.140.870
341181053.0010.500.844.720
3517539.0016.101.704.581
3531420.007.900.850.730
34110133.0010.302.500.901
331121268.0010.801.375.980
3014218.0010.700.231.700
2420516.007.300.021.140
471318253.007.209.318.910
53102627.0028.902.755.051
2230220.004.700.220.720
4826166.0012.102.325.670
36261527.004.600.260.981
2926421.0011.500.372.050
33115332.007.600.491.940
451192277.008.402.304.170
371121444.0014.702.993.470



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