argmax

paddle.fluid.layers.argmax(x, axis=0)[源代码]

argmax

该OP沿 axis 计算输入 x 的最大元素的索引。

参数:
  • x (Variable) - 输入的多维 Tensor ,支持的数据类型:float32、float64、int8、int16、int32、int64。
  • axis (int,可选) - 指定对输入Tensor进行运算的轴, axis 的有效范围是[-R, R),R是输入 x 的Rank, axis 为负时与 axis +R 等价。默认值为0。

返回: Tensor ,数据类型int64

返回类型:Variable

代码示例

import paddle.fluid as fluid
import numpy as np

in1 = np.array([[[5,8,9,5],
                 [0,0,1,7],
                 [6,9,2,4]],
                [[5,2,4,2],
                 [4,7,7,9],
                 [1,7,0,6]]])
with fluid.dygraph.guard():
    x = fluid.dygraph.to_variable(in1)
    out1 = fluid.layers.argmax(x=x, axis=-1)
    out2 = fluid.layers.argmax(x=x, axis=0)
    out3 = fluid.layers.argmax(x=x, axis=1)
    out4 = fluid.layers.argmax(x=x, axis=2)
    print(out1.numpy())
    # [[2 3 1]
    #  [0 3 1]]
    print(out2.numpy())
    # [[0 0 0 0]
    #  [1 1 1 1]
    #  [0 0 0 1]]
    print(out3.numpy())
    # [[2 2 0 1]
    #  [0 1 1 1]]
    print(out4.numpy())
    # [[2 3 1]
    #  [0 3 1]]