n_best cannot be larger than n_components, but (param1) > (param1)

Package:

scikit-learn

47032

Exception Class:

ValueError

Raise code

elf.n_components < 1:
            raise ValueError("Parameter n_components must be greater than 0,"
                             " but its value is {}".format(self.n_components))
        if self.n_best < 1:
            raise ValueError("Parameter n_best must be greater than 0,"
                             " but its value is {}".format(self.n_best))
        if self.n_best > self.n_components:
            raise ValueError("n_best cannot be larger than"
                             " n_components, but {} >  {}"
                             "".format(self.n_best, self.n_components))

    def _fit(self, X):
        n_sv = self.n_components
        if self.method == 'bistochastic':
            normalized_data = _bistochastic_normalize(X)

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Links to the raise (1)

https://github.com/scikit-learn/scikit-learn/blob/c67518350f91072f9d37ed09c5ef7edf555b6cf6/sklearn/cluster/_bicluster.py#L457

Ways to fix

n_best shouldn't greater than n_components.

Code to reproduce the exception:

$ pip install scikit-learn==1.0.2

from sklearn.cluster import SpectralBiclustering
import numpy as np
X = np.array([[1, 1], [2, 1], [1, 0],
              [4, 7], [3, 5], [3, 6]])
clustering = SpectralBiclustering(n_clusters=2,n_components=3,random_state=0,n_best=5).fit(X)
print(clustering.row_labels_)

---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
<ipython-input-31-d85870820f04> in <module>()  3 X = np.array([[1, 1], [2, 1], [1, 0],  4 [4, 7], [3, 5], [3, 6]]) ----> 5 clustering = SpectralBiclustering(n_clusters=2,n_components=3,random_state=0,n_best=5).fit(X)  6 print(clustering.row_labels_) 
/usr/local/lib/python3.7/dist-packages/sklearn/cluster/_bicluster.py in fit(self, X, y)  129 """  130 X = self._validate_data(X, accept_sparse="csr", dtype=np.float64) --> 131 self._check_parameters()  132 self._fit(X)  133 return self 
/usr/local/lib/python3.7/dist-packages/sklearn/cluster/_bicluster.py in _check_parameters(self)  530 raise ValueError(  531 "n_best cannot be larger than n_components, but {} > {}".format( --> 532 self.n_best, self.n_components  533 )  534 ) 
ValueError: n_best cannot be larger than n_components, but 5 > 3

Fixed version of the code:

from sklearn.cluster import SpectralBiclustering
import numpy as np
X = np.array([[1, 1], [2, 1], [1, 0],
              [4, 7], [3, 5], [3, 6]])
clustering = SpectralBiclustering(n_clusters=2,n_components=3,random_state=0,n_best=3).fit(X)
print(clustering.row_labels_)

Mar 29, 2022

kellemnegasi 30.0k

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