无法让 numpy.transpose 对表面上看起来是数组的对象进行操作？

Question

以下代码采用排列为 3 行 14 列的列表列表并将其转换为数组。然而，numpy.flip 和 numpy.transpose 的应用似乎对新数组没有任何作用，尽管可以识别形状......尽管 'shape' 说？

fitarray = numpy.array(listoflists)

print 'original'
print fitarray
print 'shape:', fitarray.shape

#reverse order in array
numpy.flipud(numpy.fliplr(fitarray))

print 'after flipping'
print fitarray
print 'shape:' fitarray.shape

numpy.transpose(fitarray)

print 'after transpose'
print fitarray
print 'shape:' fitarray.shape

以上代码的输出如下：

原创

[[ 1.          1.          0.75922332  0.72510804  0.60655371  0.61518896
   0.43338281  0.31000672  0.36051202  0.29079866  0.28775219  0.41336631
   0.53799258  0.52036007]
 [ 0.46761031  0.9629559   1.          1.          1.          1.
   0.95181012  0.90766551  0.88126941  0.88357832  0.90511121  0.95506566
   0.99609776  1.        ]
 [ 0.55385467  0.91574368  0.78931241  0.83173184  0.87563584  0.9592057
   1.          1.          1.          1.          1.          1.          1.
   0.99809394]]

shape: (3, 14)

翻转后

[[ 1.          1.          0.75922332  0.72510804  0.60655371  0.61518896
   0.43338281  0.31000672  0.36051202  0.29079866  0.28775219  0.41336631
   0.53799258  0.52036007]
 [ 0.46761031  0.9629559   1.          1.          1.          1.
   0.95181012  0.90766551  0.88126941  0.88357832  0.90511121  0.95506566
   0.99609776  1.        ]
 [ 0.55385467  0.91574368  0.78931241  0.83173184  0.87563584  0.9592057
   1.          1.          1.          1.          1.          1.          1.
   0.99809394]]

shape: (3, 14)

转置后

[[ 1.          1.          0.75922332  0.72510804  0.60655371  0.61518896
   0.43338281  0.31000672  0.36051202  0.29079866  0.28775219  0.41336631
   0.53799258  0.52036007]
 [ 0.46761031  0.9629559   1.          1.          1.          1.
   0.95181012  0.90766551  0.88126941  0.88357832  0.90511121  0.95506566
   0.99609776  1.        ]
 [ 0.55385467  0.91574368  0.78931241  0.83173184  0.87563584  0.9592057
   1.          1.          1.          1.          1.          1.          1.
   0.99809394]]

shape: (3, 14)

Answer 1

您需要根据 docs

分配运算结果

示例：

In [182]:

a = np.random.randn(3*14).reshape(3,14)
a
Out[182]:
array([[-1.09047556, -0.03717911,  1.56770073, -0.44577998,  1.89357885,
        -0.53837911,  0.74492976,  0.55248619,  1.19553176, -0.90725472,
         1.33540847, -0.36895309, -0.1392841 ,  0.21324307],
       [ 0.95891412,  0.0810524 , -0.29181996,  0.2275121 ,  1.06491463,
        -0.94156398,  0.04786322,  0.15859003,  0.06085846, -0.8113653 ,
        -0.64495641,  0.03964511, -0.36936448, -1.21301754],
       [-0.1486475 ,  0.61538289, -0.42302942,  0.46333247,  1.65154601,
        -0.16310981,  0.09809179, -0.37837943,  0.98993927,  0.1095821 ,
        -0.69703357, -0.62647274,  1.05738354,  0.01542917]])

In [185]:

b = np.transpose(a)
print(a.shape, b.shape)
(3, 14) (14, 3)

In [189]:

a_copy = a.copy()
b = np.flipud(np.fliplr(a))
print((a_copy == a).all())
print((b == a).all())
True
False

无法让 numpy.transpose 对表面上看起来是数组的对象进行操作？

can't get numpy.transpose to operate on what outwardly seems to be an array?

python

arrays

transpose

numpy