我在努力学习如何在sklearn中实现TimeSeriesSplit。
以下链接中提供的建议会导致同样的ValueError。
sklearn TimeSeriesSplit交叉验证预测仅适用于分区
这是我的代码中相关部分:
from sklearn.model_selection import cross_val_predict
from sklearn import svm
features = df[df.columns[0:6]]
target = df['target']
clf = svm.SVC(random_state=0)
pred = cross_val_predict(clf, features, target, cv=TimeSeriesSplit(n_splits=5).split(features))
ValueError Traceback (most recent call last)
<ipython-input-57-d1393cd05640> in <module>()
----> 1 pred = cross_val_predict(clf, features, target, cv=TimeSeriesSplit(n_splits=5).split(features))
/home/jedwards/anaconda3/envs/py36/lib/python3.6/site-packages/sklearn/model_selection/_validation.py in cross_val_predict(estimator, X, y, groups, cv, n_jobs, verbose, fit_params, pre_dispatch, method)
407
408 if not _check_is_permutation(test_indices, _num_samples(X)):
--> 409 raise ValueError('cross_val_predict only works for partitions')
410
411 inv_test_indices = np.empty(len(test_indices), dtype=int)
ValueError: cross_val_predict only works for partitions