我试图运行使用样本权重的阵列的简单Sklearn岭回归。 X_train是由100 2D numpy的阵列〜200K。我尝试使用sample_weight选项时出现内存错误。没有这个选项,它工作得很好。为了简单起见,我将特征减少到2,并且sklearn仍然会引发内存错误。 任何想法?sklearn岭和sample_weight给出内存错误
model=linear_model.Ridge()
model.fit(X_train, y_train,sample_weight=w_tr)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/g/anaconda/lib/python2.7/site-packages/sklearn/linear_model/ridge.py", line 449, in fit
return super(Ridge, self).fit(X, y, sample_weight=sample_weight)
File "/home/g/anaconda/lib/python2.7/site-packages/sklearn/linear_model/ridge.py", line 338, in fit
solver=self.solver)
File "/home/g/anaconda/lib/python2.7/site-packages/sklearn/linear_model/ridge.py", line 286, in ridge_regression
K = safe_sparse_dot(X, X.T, dense_output=True)
File "/home/g/anaconda/lib/python2.7/site-packages/sklearn/utils/extmath.py", line 83, in safe_sparse_dot
return np.dot(a, b)
MemoryError
感谢@ogrisel为我指出sklearn线性模型以数据为中心这一事实 – eickenberg
[此增强建议](https://github.com/scikit-learn/scikit-learn/pull/3034)实现了解释的功能以上。 – eickenberg
scikit学习的最新版本现在支持特征空间中的样本权重。 – eickenberg