subtract¶

paddle. subtract ( x, y, name=None ) [source]

Substract two tensors element-wise. The equation is:

\[out = x - y\]

Note

paddle.subtract supports broadcasting. If you want know more about broadcasting, please refer to Introduction to Tensor .

Parameters

• x (Tensor) – the input tensor, it’s data type should be float32, float64, int32, int64.

• y (Tensor) – the input tensor, it’s data type should be float32, float64, int32, int64.

• name (str, optional) – Name for the operation (optional, default is None). For more information, please refer to Name.

Returns

N-D Tensor. A location into which the result is stored. If x, y have different shapes and are “broadcastable”, the resulting tensor shape is the shape of x and y after broadcasting. If x, y have the same shape, its shape is the same as x and y.

Examples

import paddle

x = paddle.to_tensor([[1, 2], [7, 8]])
y = paddle.to_tensor([[5, 6], [3, 4]])
res = paddle.subtract(x, y)
print(res)
# Tensor(shape=[2, 2], dtype=int64, place=Place(cpu), stop_gradient=True,
#        [[-4, -4],
#         [ 4,  4]])

x = paddle.to_tensor([[[1, 2, 3], [1, 2, 3]]])
y = paddle.to_tensor([1, 0, 4])
res = paddle.subtract(x, y)
print(res)
# Tensor(shape=[1, 2, 3], dtype=int64, place=Place(cpu), stop_gradient=True,
#        [[[ 0,  2, -1],
#          [ 0,  2, -1]]])

x = paddle.to_tensor([2, float('nan'), 5], dtype='float32')
y = paddle.to_tensor([1, 4, float('nan')], dtype='float32')
res = paddle.subtract(x, y)
print(res)
# Tensor(shape=[3], dtype=float32, place=Place(cpu), stop_gradient=True,
#        [1. , nan, nan])

x = paddle.to_tensor([5, float('inf'), -float('inf')], dtype='float64')
y = paddle.to_tensor([1, 4, 5], dtype='float64')
res = paddle.subtract(x, y)
print(res)
# Tensor(shape=[3], dtype=float64, place=Place(cpu), stop_gradient=True,
#        [ 4.  ,  inf., -inf.])