Python 值错误：未知标签类型：“未知”
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ValueError: Unknown label type: 'unknown'
提问by Ivan Zhovannik
I try to run following code. Btw, I am new to both python and sklearn.
我尝试运行以下代码。顺便说一句，我是 python 和 sklearn 的新手。
import pandas as pd
import numpy as np
from sklearn.linear_model import LogisticRegression
# data import and preparation
trainData = pd.read_csv('train.csv')
train = trainData.values
testData = pd.read_csv('test.csv')
test = testData.values
X = np.c_[train[:, 0], train[:, 2], train[:, 6:7], train[:, 9]]
X = np.nan_to_num(X)
y = train[:, 1]
Xtest = np.c_[test[:, 0:1], test[:, 5:6], test[:, 8]]
Xtest = np.nan_to_num(Xtest)
# model
lr = LogisticRegression()
lr.fit(X, y)
where y is a np.ndarray of 0's and 1's
其中 y 是 0 和 1 的 np.ndarray
I receive the following:
我收到以下信息：
File "C:\Anaconda3\lib\site-packages\sklearn\linear_model\logistic.py", line >1174, in fit check_classification_targets(y)
File "C:\Anaconda3\lib\site-packages\sklearn\utils\multiclass.py", line 172, >in check_classification_targets raise ValueError("Unknown label type: %r" % y_type)
ValueError: Unknown label type: 'unknown'
文件“C:\Anaconda3\lib\site-packages\sklearn\linear_model\logistic.py”，第 1174 行，适合 check_classification_targets(y)
文件“C:\Anaconda3\lib\site-packages\sklearn\utils\multiclass.py”，第 172 行，>in check_classification_targets raise ValueError("Unknown label type: %r" % y_type)
值错误：未知标签类型：“未知”
from sklearn documentation: http://scikit-learn.org/stable/modules/generated/sklearn.linear_model.LogisticRegression.html#sklearn.linear_model.LogisticRegression.fit
来自 sklearn 文档：http://scikit-learn.org/stable/modules/generated/sklearn.linear_model.LogisticRegression.html#sklearn.linear_model.LogisticRegression.fit
y : array-like, shape (n_samples,) Target values (class labels in classification, real numbers in regression)
y : 类数组，形状 (n_samples,) 目标值（分类中的类标签，回归中的实数）
What is my error?
我的错误是什么？
upd:
更新：
y is array([0.0, 1.0, 1.0, ..., 0.0, 1.0, 0.0], dtype=object) size is (891,)
y 是数组([0.0, 1.0, 1.0, ..., 0.0, 1.0, 0.0], dtype=object) 大小是 (891,)
回答by Miriam Farber
Your yis of type object, so sklearn cannot recognize its type. Add the line y=y.astype('int')right after the line y = train[:, 1].
你y是 type object，所以 sklearn 无法识别它的类型。在行y=y.astype('int')之后添加行y = train[:, 1]。
