除了简单的下拉框,tkinter中的Select控件还支持其他功能。例如,你可以使用列表框(Listbox)创建多选下拉框,或者添加滚动条以处理过多的选项。 示例:使用Listbox创建多选选择框 importtkinterastkdefsubmit_selection():selected_indices=listbox.curselection()selected_items=[listbox.get(i)foriinselected_indices]print(f...
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我应该如何将这个布尔数组与我可以通过以下方法获得的所有功能名称的数组一起使用: feature_names = list(features_dataframe.columns.values) 您可以执行以下操作: mask = select_k_best_classifier.get_support() #list of booleans new_features = [] # The list of your K best features for bool, feature ...
.setNumTopFeatures(2) selector.linkFrom(source) modelInfo: ChisqSelectorModelInfo=selector.collectModelInfo()print(modelInfo.getColNames()) Java 代码 importorg.apache.flink.types.Row;importcom.alibaba.alink.operator.batch.BatchOperator;importcom.alibaba.alink.operator.batch.feature.ChiSqSelectorBatchO...
You cannot save the module if any column has an invalid name, so be sure to check the names beforehand. You can also use this method to specify a list of columns using their index values. See the Examples section for tips on how to work with column indices....
问熊猫矢量组合:嵌套循环，MultiIndex loc，numpy selectEN我可以使用矢量化方法实现步骤4中看到的显式for...
selector = SelectKBest(lambda X, Y: np.array(list(map(lambda x: pearsonr(x, Y)[0], X.T))).T, k=2) iris_data = pd.DataFrame(selector.fit_transform(iris.data, iris.target),columns=np.array(iris.feature_names)[selector.get_support(indices=True)]) ...
You can also use this method to specify a list of columns using their index values. See theExamplessection for tips on how to work with column indices. Choose by type If you use theWITH RULESoption, you can apply multiple conditions on the column selections. For example, you might need ...
You can also examine the keys or indices and values by using dictionary-like, Python tools: The output is: True Another example: The output is: Index(['a', 'b', 'c', 'd'], dtype='object') Another example: The output is:
Java 类名:com.alibaba.alink.operator.batch.feature.VectorChiSqSelectorBatchOp Python 类名:VectorChiSqSelectorBatchOp 功能介绍 针对vector数据,进行特征筛选 参数说明 名称 中文名称 描