transpose¶

paddle.fluid.layers.transpose(x, perm, name=None)[source]

Permute the data dimensions of input according to perm.

The i-th dimension of the returned tensor will correspond to the perm[i]-th dimension of input.

Parameters

• x (Variable) – The input Tensor. It is a N-D Tensor of data types float32, float64, int32.

• perm (list) – Permute the input accoring to the data of perm.

• name (str) – The name of this layer. It is optional.

Returns

A transposed n-D Tensor, with data type being float32, float64, int32, int64.

Return type

Variable

For Example:

x = [[[ 1  2  3  4] [ 5  6  7  8] [ 9 10 11 12]]
    [[13 14 15 16] [17 18 19 20] [21 22 23 24]]]
shape(x) =  [2,3,4]

# Example 1
perm0 = [1,0,2]
y_perm0 = [[[ 1  2  3  4] [13 14 15 16]]
          [[ 5  6  7  8]  [17 18 19 20]]
          [[ 9 10 11 12]  [21 22 23 24]]]
shape(y_perm0) = [3,2,4]

# Example 2
perm1 = [2,1,0]
y_perm1 = [[[ 1 13] [ 5 17] [ 9 21]]
          [[ 2 14] [ 6 18] [10 22]]
          [[ 3 15]  [ 7 19]  [11 23]]
          [[ 4 16]  [ 8 20]  [12 24]]]
shape(y_perm1) = [4,3,2]

Examples

# use append_batch_size=False to avoid prepending extra
# batch size in shape
import paddle.fluid as fluid
x = fluid.layers.data(name='x', shape=[2, 3, 4],
                dtype='float32', append_batch_size=False)
x_transposed = fluid.layers.transpose(x, perm=[1, 0, 2])
print x_transposed.shape
#(3L, 2L, 4L)