我做了多標記數據網格搜索如下:GridSearch爲多標記OneVsRestClassifier?
#imports
from sklearn.svm import SVC as classifier
from sklearn.pipeline import Pipeline
from sklearn.decomposition import RandomizedPCA
from sklearn.cross_validation import StratifiedKFold
from sklearn.grid_search import GridSearchCV
#classifier pipeline
clf_pipeline = clf_pipeline = OneVsRestClassifier(
Pipeline([('reduce_dim', RandomizedPCA()),
('clf', classifier())
]
))
C_range = 10.0 ** np.arange(-2, 9)
gamma_range = 10.0 ** np.arange(-5, 4)
n_components_range = (10, 100, 200)
degree_range = (1, 2, 3, 4)
param_grid = dict(estimator__clf__gamma=gamma_range,
estimator__clf__c=c_range,
estimator__clf__degree=degree_range,
estimator__reduce_dim__n_components=n_components_range)
grid = GridSearchCV(clf_pipeline, param_grid,
cv=StratifiedKFold(y=Y, n_folds=3), n_jobs=1,
verbose=2)
grid.fit(X, Y)
我看到下面的回溯:
/Users/andrewwinterman/Documents/sparks-honey/classifier/lib/python2.7/site-packages/sklearn/grid_search.pyc in fit_grid_point(X, y, base_clf, clf_params, train, test, loss_func, score_func, verbose, **fit_params)
107
108 if y is not None:
--> 109 y_test = y[safe_mask(y, test)]
110 y_train = y[safe_mask(y, train)]
111 clf.fit(X_train, y_train, **fit_params)
TypeError: only integer arrays with one element can be converted to an index
貌似GridSearchCV對象到多個標籤。我應該如何解決這個問題?我需要通過獨特的教學班,label_binarizer明確迭代,每個子估計運行網格搜索?
您使用0.12.1還是0.13?我認爲升級到0.13時問題應該消失。 –
我使用0.13的開發分支。我會盡快再試一次。 – Maus
應該在0.13版本與當前主合作。如果沒有,請在github上打開一個問題。 –