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随机打乱工具sklearn.utils.shuffle，将原有的序列打乱，返回一个全新的错乱顺序的值

分类: IT文章 • 2023-11-02 14:28:02

Shuffle arrays or sparse matrices in a consistent way

This is a convenience alias to resample(*arrays, replace=False) to do random permutations of the collections.

Parameters:

*arrays : sequence of indexable data-structures

Indexable data-structures can be arrays, lists, dataframes or scipy sparse matrices with consistent first dimension.

random_state : int or RandomState instance

Control the shuffling for reproducible behavior.

n_samples : int, None by default

Number of samples to generate. If left to None this is automatically set to the first dimension of the arrays.
Returns:

shuffled_arrays : sequence of indexable data-structures

Sequence of shuffled views of the collections. The original arrays are not impacted.

 
# -*- coding: utf-8 -*-
"""
Spyder Editor

This is a temporary script file.
"""

import numpy as np

X = np.array([[1., 0.], [2., 1.], [0., 0.]])
y = np.array([0, 1, 2])

from scipy.sparse import coo_matrix
X_sparse = coo_matrix(X)

print '稀疏矩阵%s
',X_sparse

from sklearn.utils import shuffle
X, X_sparse, y = shuffle(X, X_sparse, y, random_state=0)
print 'X值
', X

print 'X_sparse值
', X_sparse

print 'y值
', y

'''
稀疏矩阵%s
  (0, 0)        1.0
  (1, 0)        2.0
  (1, 1)        1.0
X值
[[ 0.  0.]
 [ 2.  1.]
 [ 1.  0.]]
X_sparse值
  (1, 1)        1.0
  (1, 0)        2.0
  (2, 0)        1.0
y值
[2 1 0]
'''

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