The workaround succeeded. Thanks, Danny!
I posted a github issue.
On Fri, Jul 25, 2014 at 2:36 AM, Danny Sullivan <[email protected]>
wrote:
> Hi Rose,
>
> That's a good question. Is your y in this case string labels? I believe
> this is bug that occurs because label encoding is happening both in the
> SGDClassifier and the compute_class_weight function. I've posted a
> work-around on your stackoverflow question so you can go ahead and give
> that a try.
>
> Can you open up an issue for this on github?
>
> Hope that helps,
>
> Danny
>
> ------------------------------
> From: [email protected]
> Date: Thu, 24 Jul 2014 18:12:36 -0700
> To: [email protected]
> Subject: [Scikit-learn-general] SGDClassifier with class_weight=auto fails
> on linux, but not on osx
>
>
> When I train an scikit-learn SGDClassifier
> <http://scikit-learn.org/stable/modules/generated/sklearn.linear_model.SGDClassifier.html>
> with
> these options: SGDClassifier(loss='log', class_weight=None, penalty='l2'),
> training completes with no error.
>
> When I train this classifier with class_weight='auto' on my mac, training
> still completes with no error.
>
> Yet when I train this classifier with class_weight='auto' on a linux ec2
> instance, I get this error:
>
> return self.model.fit(X, y)
> File
> "/usr/local/lib/python2.7/dist-packages/sklearn/linear_model/stochastic_gradient.py",
> line 484, in fit
> sample_weight=sample_weight)
> File
> "/usr/local/lib/python2.7/dist-packages/sklearn/linear_model/stochastic_gradient.py",
> line 388, in _fit
> classes, sample_weight, coef_init, intercept_init)
> File
> "/usr/local/lib/python2.7/dist-packages/sklearn/linear_model/stochastic_gradient.py",
> line 335, in _partial_fit
> y_ind)
> File
> "/usr/local/lib/python2.7/dist-packages/sklearn/utils/class_weight.py", line
> 43, in compute_class_weight
> raise ValueError("classes should have valid labels that are in y")
>
> What could cause it? I'm running the latest version of scikit-learn. (On
> macosx, it worked on both 0.14 and 0.15. On linux, it failed on both
> 0.15.0b1 and 0.15)
>
> Here's the StackOverflow question I posted:
>
>
> http://stackoverflow.com/questions/24808821/sgdclassifier-with-class-weight-auto-fails-on-linux-but-not-on-osx
>
>
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