我正在尝试训练决策树模型，但我一直遇到错误，代码如下：
from sklearn.tree import DecisionTreeClassifier
dtree = DecisionTreeClassifier()
dtree.fit(X_train, y_train)
我已成功导入此代码所需的模块，但遇到错误：
---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
<ipython-input-91-b6417fbfb8de> in <module>
1 from sklearn.tree import DecisionTreeClassifier
2 dtree = DecisionTreeClassifier()
----> 3 dtree.fit(X_train, y_train)
~\Anaconda3\lib\site-packages\sklearn\tree\_classes.py in fit(self, X, y, sample_weight,
check_input, X_idx_sorted)
888 """
889
--> 890 super().fit(
891 X, y,
892 sample_weight=sample_weight,
~\Anaconda3\lib\site-packages\sklearn\tree\_classes.py in fit(self, X, y, sample_weight,
check_input, X_idx_sorted)
154 check_X_params = dict(dtype=DTYPE, accept_sparse="csc")
155 check_y_params = dict(ensure_2d=False, dtype=None)
--> 156 X, y = self._validate_data(X, y,
157 validate_separately=(check_X_params,
158 check_y_params))
~\Anaconda3\lib\site-packages\sklearn\base.py in _validate_data(self, X, y, reset,
validate_separately, **check_params)
427 # :(
428 check_X_params, check_y_params = validate_separately
--> 429 X = check_array(X, **check_X_params)
430 y = check_array(y, **check_y_params)
431 else:
~\Anaconda3\lib\site-packages\sklearn\utils\validation.py in inner_f(*args, **kwargs)
70 FutureWarning)
71 kwargs.update({k: arg for k, arg in zip(sig.parameters, args)})
---> 72 return f(**kwargs)
73 return inner_f
74
~\Anaconda3\lib\site-packages\sklearn\utils\validation.py in check_array(array,
accept_sparse, accept_large_sparse, dtype, order, copy, force_all_finite, ensure_2d,
allow_nd, ensure_min_samples, ensure_min_features, estimator)
596 array = array.astype(dtype, casting="unsafe", copy=False)
597 else:
--> 598 array = np.asarray(array, order=order, dtype=dtype)
599 except ComplexWarning:
600 raise ValueError("Complex data not supported\n"
~\Anaconda3\lib\site-packages\numpy\core\_asarray.py in asarray(a, dtype, order)
81
82 """
---> 83 return array(a, dtype, copy=False, order=order)
84
85
~\Anaconda3\lib\site-packages\pandas\core\generic.py in __array__(self, dtype)
1779
1780 def __array__(self, dtype=None) -> np.ndarray:
-> 1781 return np.asarray(self._values, dtype=dtype)
1782
1783 def __array_wrap__(self, result, context=None):
~\Anaconda3\lib\site-packages\numpy\core\_asarray.py in asarray(a, dtype, order)
81
82 """
---> 83 return array(a, dtype, copy=False, order=order)
84
85
ValueError: could not convert string to float: 'SFC/CBU Reversal'