刚开始使用ML并且需要一些帮助才能让sklearn与熊猫一起工作。
我正在读这篇文章并决定尝试使用我拥有的DataFrame。以下是我所做的,以及来自它的错误。如果我忽略了一些愚蠢的东西,我对所有这些都很陌生,所以请原谅我,但我觉得最好在这里问一下,而不是试图在没有真正理解的情况下找到答案。
谢谢你们!
In [518]: cols = ['A','B','C','D','E','F','G','H','I','J','K']
In [519]: x = df['Miss'].values
In [520]: y = df[list(cols)].values
In [532]: y.shape
Out[532]: (11345, 11)
In [533]: x.shape
Out[533]: (11345,)
clf = Pipeline([
('feature_selection', LinearSVC(penalty="l1", dual=False)),
('classification', RandomForestClassifier())])
In [536]: clf.fit(x,y)
---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
/home/cschwalbach/as_research_repo/logs/<ipython-input-536-5c1831092d7a> in <module>()
----> 1 clf.fit(x,y)
/usr/lib64/python2.7/site-packages/sklearn/pipeline.pyc in fit(self, X, y, **fit_params)
124 data, then fit the transformed data using the final estimator.
125 """
--> 126 Xt, fit_params = self._pre_transform(X, y, **fit_params)
127 self.steps[-1][-1].fit(Xt, y, **fit_params)
128 return self
/usr/lib64/python2.7/site-packages/sklearn/pipeline.pyc in _pre_transform(self, X, y, **fit_params)
114 for name, transform in self.steps[:-1]:
115 if hasattr(transform, "fit_transform"):
--> 116 Xt = transform.fit_transform(Xt, y, **fit_params_steps[name])
117 else:
118 Xt = transform.fit(Xt, y, **fit_params_steps[name]) \
/usr/lib64/python2.7/site-packages/sklearn/base.pyc in fit_transform(self, X, y, **fit_params)
362 else:
363 # fit method of arity 2 (supervised transformation)
--> 364 return self.fit(X, y, **fit_params).transform(X)
365
366
/usr/lib64/python2.7/site-packages/sklearn/svm/base.pyc in fit(self, X, y)
684 raise ValueError("X and y have incompatible shapes.\n"
685 "X has %s samples, but y has %s." %
--> 686 (X.shape[0], y.shape[0]))
687
688 liblinear.set_verbosity_wrap(self.verbose)
ValueError: X and y have incompatible shapes.
X has 1 samples, but y has 124795.
答案 0 :(得分:3)
大多数人使用X作为特征,使用y作为标签。不幸的是,你是一个相反的方式。所以你可能会对文档感到困惑。
请改用以下内容
In [519]: y = df['Miss'].values
In [520]: X = df[list(cols)].values
然后您可以按clf.fit(X, y)