有关使用sklearn LogisticRegression出现的 DeprecationWarning:

    xiaoxiao2021-03-25  106

    原Warning如下:

    C:\Python27\lib\site-packages\sklearn\utils\validation.py:395: DeprecationWarning: Passing 1d arrays as data is deprecated in 0.17 and will raise ValueError in 0.19. Reshape your data either using X.reshape(-1, 1) if your data has a single feature or X.reshape(1, -1) if it contains a single sample.

    之前输入的测试代码如下:

    from sklearn.externals import joblib from array import array from sklearn.linear_model import LogisticRegression import numpy as np x = [24, 0, 251, 38, 20, 52, 168, 1] print type(x) classifier =(joblib.load('classifier.model')) result = classifier.predict(x) print result[0] 改正输入x 

    x = [[24, 0, 251, 38, 20, 52, 168, 1]]这样就没有DeprecationWarning了。

    分析:主要问题在 

    classifier.predict(x)

    对于我的情况,虽然是一个sample ,但是也要规范输入x =  [ [sample1 features] , [sample2 features] ... [samplen features] ].

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