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  • tf.transpose()的用法

    一、tensorflow官方文档内容

    transpose(
        a,
        perm=None,
        name='transpose'
    )
    

    Defined in tensorflow/python/ops/array_ops.py.

    See the guides: Math > Matrix Math FunctionsTensor Transformations > Slicing and Joining

    Transposes a. Permutes the dimensions according to perm.

    The returned tensor's dimension i will correspond to the input dimension perm[i]. If perm is not given, it is set to (n-1...0), where n is the rank of the input tensor. Hence by default, this operation performs a regular matrix transpose on 2-D input Tensors.

    For example:  

    # 'x' is [[1 2 3]
    #         [4 5 6]]
    tf.transpose(x) ==> [[1 4]
                         [2 5]
                         [3 6]]
    
    # Equivalently
    tf.transpose(x, perm=[1, 0]) ==> [[1 4]
                                      [2 5]
                                      [3 6]]
    
    # 'perm' is more useful for n-dimensional tensors, for n > 2
    # 'x' is   [[[1  2  3]
    #            [4  5  6]]
    #           [[7  8  9]
    #            [10 11 12]]]
    # Take the transpose of the matrices in dimension-0
    tf.transpose(x, perm=[0, 2, 1]) ==> [[[1  4]
                                          [2  5]
                                          [3  6]]
    
                                         [[7 10]
                                          [8 11]
                                          [9 12]]]
    

    Args:

    • a: A Tensor.
    • perm: A permutation of the dimensions of a.
    • name: A name for the operation (optional).

    Returns:

    A transposed Tensor.

    二、中文翻译

    transpose(
        a,
        perm=None,
        name='transpose'
    )
    

    Defined in tensorflow/python/ops/array_ops.py.

    See the guides: Math > Matrix Math FunctionsTensor Transformations > Slicing and Joining

    a的转置是根据 perm 的设定值来进行的。 

    返回数组的 dimension(尺寸、维度) i与输入的 perm[i]的维度相一致。如果未给定perm,默认设置为 (n-1...0),这里的 n 值是输入变量的 rank 。因此默认情况下,这个操作执行了一个正规(regular)的2维矩形的转置。

    例子:

    # 'x' is [[1 2 3]
    #         [4 5 6]]
    tf.transpose(x) ==> [[1 4]
                         [2 5]
                         [3 6]]
    
    # Equivalently(等价于)
    tf.transpose(x, perm=[1, 0]) ==> [[1 4]
                                      [2 5]
                                      [3 6]]
    
    # 'perm' is more useful for n-dimensional tensors, for n > 2
    # 'x' is   [[[1  2  3]
    #            [4  5  6]]
    #           [[7  8  9]
    #            [10 11 12]]]
    # Take the transpose of the matrices in dimension-0
    tf.transpose(x, perm=[0, 2, 1]) ==> [[[1  4]
                                          [2  5]
                                          [3  6]]
    
                                         [[7 10]
                                          [8 11]
                                          [9 12]]]
    

    参数:  

    • a: a 是一个张量(Tensor)
    • perm: perm 是 a 维度的置换
    • name:操作的名称(可选).

    返回值:

       返回的是一个转置的张量。

    三、解释

    tf.transpose(input, [dimension_1, dimenaion_2,..,dimension_n]):这个函数主要适用于交换输入张量的不同维度用的,如果输入张量是二维,就相当是转置。dimension_n是整数,如果张量是三维,就是用0,1,2来表示。这个列表里的每个数对应相应的维度。如果是[2,1,0],就把输入张量的第三维度和第一维度交换。  

     
    ----------------------------------
    参考链接:
      1、 tf.transpose函数的用法: https://i.cnblogs.com/EditPosts.aspx?opt=1
      2、 tensorflow中的不懂得知识点——转置函数 transpose : http://blog.csdn.net/u010417185/article/details/51900441
      3、tensorflow官方文档 https://www.tensorflow.org/versions/r1.3/api_docs/python/tf/transpose
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  • 原文地址:https://www.cnblogs.com/hezhiyao/p/8476160.html
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