我使用OneHotEncoder将分类数据更改为二进制。我用一种方法抛出一个错误，说用作索引的数组必须是整数（或布尔值）类型。我的数据集包含分类值数字值，包括浮点值。我该怎么办！
一个原始数据示例如下所示，
[0,tcp,vmnet,REJ,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,275,13,0.00,0.00,1.00,1.00,0.05,0.06,0.00,255,13,0.05,0.06,0.00,0.00,0.00,0.00,1.00,1.00]
encoder = OneHotEncoder(categorical_features = nominal_cols,
handle_unknown = "ignore")
train_x = encoder.fit_transform(train_x_raw)
test_x = encoder.transform(test_x_raw)
classifier = DecisionTreeClassifier(random_state=17)
classifier.fit(train_x, train_Y)
pred_y = classifier.predict(test_x)
IndexError：用作索引的数组必须为整数（或布尔值）类型