.squeeze()

The PyTorch .squeeze() function removes dimensions of size 1 from a given tensor.

Syntax

torch.squeeze(input, dim=None)

• input: The input tensor from which dimensions of size 1 will be removed.
• dim (Optional): A specific dimension to squeeze. If provided, only the dimension of size 1 at that index will be removed. If not provided, all dimensions with size 1 will be removed.

Example

The following example demonstrates how the .squeeze() function removes dimensions of size 1 from the tensor x, resulting in a tensor y with reduced dimensions:

import torch

# Create a tensor with dimensions (1, 1, 2, 1, 3)
x = torch.rand(1, 1, 2, 1, 3)
print("Original tensor size:", x.size())

# Apply the .squeeze() operation to remove all dimensions of size '1'
y = torch.squeeze(x)
print("Squeezed tensor (all dims) size:", y.size())

# Apply the .squeeze() operation with 'dim=1' to only remove the dimension at index '1'
z = torch.squeeze(x, dim=1)
print("Squeezed tensor (dim=1) size:", z.size())

The above code generates the following output:

Original tensor size: torch.Size([1, 1, 2, 1, 3])
Squeezed tensor (all dims) size: torch.Size([2, 3])
Squeezed tensor (dim=1) size: torch.Size([1, 2, 1, 3])