*Memos:
- My post explains split().
- My post explains hsplit().
- My post explains dsplit().
- My post explains tensor_split().
- My post explains chunk().
- My post explains unbind().
vsplit() can get the one or more 2D or more D vertically splitted view tensors of zero or more elements from the 2D or more D tensor of zero or more elements as shown below:
*Memos:
-
vsplit()
can be used with torch or a tensor. - The 1st argument(
input
) withtorch
or using a tensor(Required-Type:tensor
ofint
,float
,complex
orbool
). - The 2nd argument with
torch
or the 1st argument with a tensor issections
(Required-Type:int
). - The 2nd argument with
torch
or the 1st argument with a tensor isindices
(Required-Type:tuple
ofint
orlist
ofint
). - The total number of the zero or more elements of one or more returned tensors changes.
- One or more returned tensors keep the dimension of the original tensor.
import torch
my_tensor = torch.tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]])
torch.vsplit(input=my_tensor, sections=1)
my_tensor.vsplit(sections=1)
# (tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]),)
torch.vsplit(input=my_tensor, sections=3)
# (tensor([[0, 1, 2, 3]]),
# tensor([[4, 5, 6, 7]]),
# tensor([[8, 9, 10, 11]]))
torch.vsplit(input=my_tensor, indices=(0,))
torch.vsplit(input=my_tensor, indices=(-3,))
# (tensor([], size=(0, 4), dtype=torch.int64),
# tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]))
torch.vsplit(input=my_tensor, indices=(1,))
torch.vsplit(input=my_tensor, indices=(-2,))
# (tensor([[0, 1, 2, 3]]),
# tensor([[4, 5, 6, 7], [8, 9, 10, 11]]))
torch.vsplit(input=my_tensor, indices=(2,))
torch.vsplit(input=my_tensor, indices=(-1,))
# (tensor([[0, 1, 2, 3], [4, 5, 6, 7]]),
# tensor([[8, 9, 10, 11]]))
torch.vsplit(input=my_tensor, indices=(3,))
# (tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]),
# tensor([], size=(0, 4), dtype=torch.int64))
torch.vsplit(input=my_tensor, indices=(0, 0))
torch.vsplit(input=my_tensor, indices=(0, -3))
# (tensor([], size=(0, 4), dtype=torch.int64),
# tensor([], size=(0, 4), dtype=torch.int64),
# tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]))
torch.vsplit(input=my_tensor, indices=(0, 1))
torch.vsplit(input=my_tensor, indices=(0, -2))
# (tensor([], size=(0, 4), dtype=torch.int64),
# tensor([[0, 1, 2, 3]]),
# tensor([[4, 5, 6, 7], [8, 9, 10, 11]]))
torch.vsplit(input=my_tensor, indices=(0, 2))
torch.vsplit(input=my_tensor, indices=(0, -1))
# (tensor([], size=(0, 4), dtype=torch.int64),
# tensor([[0, 1, 2, 3], [4, 5, 6, 7]]),
# tensor([[8, 9, 10, 11]]))
torch.vsplit(input=my_tensor, indices=(0, 3))
# (tensor([], size=(0, 4), dtype=torch.int64),
# tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]),
# tensor([], size=(0, 4), dtype=torch.int64))
torch.vsplit(input=my_tensor, indices=(1, 0))
torch.vsplit(input=my_tensor, indices=(1, -3))
# (tensor([[0, 1, 2, 3]]),
# tensor([], size=(0, 4), dtype=torch.int64),
# tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]))
torch.vsplit(input=my_tensor, indices=(1, 1))
torch.vsplit(input=my_tensor, indices=(1, -2))
# (tensor([[0, 1, 2, 3]]),
# tensor([], size=(0, 4), dtype=torch.int64),
# tensor([[4, 5, 6, 7], [8, 9, 10, 11]]))
torch.vsplit(input=my_tensor, indices=(1, 2))
torch.vsplit(input=my_tensor, indices=(1, -1))
# (tensor([[0, 1, 2, 3]]),
# tensor([[4, 5, 6, 7]]),
# tensor([[8, 9, 10, 11]]))
torch.vsplit(input=my_tensor, indices=(1, 3))
# (tensor([[0, 1, 2, 3]]),
# tensor([[4, 5, 6, 7], [8, 9, 10, 11]]),
# tensor([], size=(0, 4), dtype=torch.int64))
torch.vsplit(input=my_tensor, indices=(2, 0))
torch.vsplit(input=my_tensor, indices=(2, -3))
# (tensor([[0, 1, 2, 3], [4, 5, 6, 7]]),
# tensor([], size=(0, 4), dtype=torch.int64),
# tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]))
torch.vsplit(input=my_tensor, indices=(2, 1))
torch.vsplit(input=my_tensor, indices=(2, -2))
# (tensor([[0, 1, 2, 3], [4, 5, 6, 7]]),
# tensor([], size=(0, 4), dtype=torch.int64),
# tensor([[4, 5, 6, 7], [8, 9, 10, 11]]))
torch.vsplit(input=my_tensor, indices=(2, 2))
torch.vsplit(input=my_tensor, indices=(2, -1))
# (tensor([[0, 1, 2, 3], [4, 5, 6, 7]]),
# tensor([], size=(0, 4), dtype=torch.int64),
# tensor([[8, 9, 10, 11]]))
torch.vsplit(input=my_tensor, indices=(2, 3))
# (tensor([[0, 1, 2, 3], [4, 5, 6, 7]]),
# tensor([[8, 9, 10, 11]]),
# tensor([], size=(0, 4), dtype=torch.int64))
torch.vsplit(input=my_tensor, indices=(3, 0))
torch.vsplit(input=my_tensor, indices=(3, -3))
# (tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]),
# tensor([], size=(0, 4), dtype=torch.int64),
# tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]))
torch.vsplit(input=my_tensor, indices=(3, 1))
torch.vsplit(input=my_tensor, indices=(3, -2))
# (tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]),
# tensor([], size=(0, 4), dtype=torch.int64),
# tensor([[4, 5, 6, 7], [8, 9, 10, 11]]))
torch.vsplit(input=my_tensor, indices=(3, 2))
torch.vsplit(input=my_tensor, indices=(3, -1))
# (tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]),
# tensor([], size=(0, 4), dtype=torch.int64),
# tensor([[8, 9, 10, 11]]))
torch.vsplit(input=my_tensor, indices=(3, 3))
# (tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]),
# tensor([], size=(0, 4), dtype=torch.int64),
# tensor([], size=(0, 4), dtype=torch.int64))
torch.vsplit(input=my_tensor, indices=(-1, 0))
torch.vsplit(input=my_tensor, indices=(-1, -3))
# (tensor([[0, 1, 2, 3], [4, 5, 6, 7]]),
# tensor([], size=(0, 4), dtype=torch.int64),
# tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]))
torch.vsplit(input=my_tensor, indices=(-1, 1))
torch.vsplit(input=my_tensor, indices=(-1, -2))
# (tensor([[0, 1, 2, 3], [4, 5, 6, 7]]),
# tensor([], size=(0, 4), dtype=torch.int64),
# tensor([[4, 5, 6, 7], [8, 9, 10, 11]]))
torch.vsplit(input=my_tensor, indices=(-1, 2))
torch.vsplit(input=my_tensor, indices=(-1, -1))
# (tensor([[0, 1, 2, 3], [4, 5, 6, 7]]),
# tensor([], size=(0, 4), dtype=torch.int64),
# tensor([[8, 9, 10, 11]]))
torch.vsplit(input=my_tensor, indices=(-1, 3))
# (tensor([[0, 1, 2, 3], [4, 5, 6, 7]]),
# tensor([[8, 9, 10, 11]]),
# tensor([], size=(0, 4), dtype=torch.int64))
torch.vsplit(input=my_tensor, indices=(-2, 0))
# (tensor([[0, 1, 2, 3]]),
# tensor([], size=(0, 4), dtype=torch.int64),
# tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]))
torch.vsplit(input=my_tensor, indices=(-2, 1))
# (tensor([[0, 1, 2, 3]]),
# tensor([], size=(0, 4), dtype=torch.int64),
# tensor([[4, 5, 6, 7], [8, 9, 10, 11]]))
torch.vsplit(input=my_tensor, indices=(-2, 2))
# (tensor([[0, 1, 2, 3]]),
# tensor([[4, 5, 6, 7]]),
# tensor([[8, 9, 10, 11]]))
torch.vsplit(input=my_tensor, indices=(-2, 3))
# (tensor([[0, 1, 2, 3]]),
# tensor([[4, 5, 6, 7], [8, 9, 10, 11]]),
# tensor([], size=(0, 4), dtype=torch.int64))
torch.vsplit(input=my_tensor, indices=(-3, 0))
torch.vsplit(input=my_tensor, indices=(-3, -3))
# (tensor([], size=(0, 4), dtype=torch.int64),
# tensor([], size=(0, 4), dtype=torch.int64),
# tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]))
torch.vsplit(input=my_tensor, indices=(-3, 1))
torch.vsplit(input=my_tensor, indices=(-3, -2))
# (tensor([], size=(0, 4), dtype=torch.int64),
# tensor([[0, 1, 2, 3]]),
# tensor([[4, 5, 6, 7], [8, 9, 10, 11]]))
torch.vsplit(input=my_tensor, indices=(-3, 2))
torch.vsplit(input=my_tensor, indices=(-3, -1))
# (tensor([], size=(0, 4), dtype=torch.int64),
# tensor([[0, 1, 2, 3], [4, 5, 6, 7]]),
# tensor([[8, 9, 10, 11]]))
torch.vsplit(input=my_tensor, indices=(-3, 3))
# (tensor([], size=(0, 4), dtype=torch.int64),
# tensor([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]]),
# tensor([], size=(0, 4), dtype=torch.int64))
my_tensor = torch.tensor([[0., 1., 2., 3.],
[4., 5., 6., 7.],
[8., 9., 10., 11.]])
torch.vsplit(input=my_tensor, sections=1)
# (tensor([[0., 1., 2., 3.],
# [4., 5., 6., 7.],
# [8., 9., 10., 11.]]),)
my_tensor = torch.tensor([[0.+0.j, 1.+0.j, 2.+0.j, 3.+0.j],
[4.+0.j, 5.+0.j, 6.+0.j, 7.+0.j],
[8.+0.j, 9.+0.j, 10.+0.j, 11.+0.j]])
torch.vsplit(input=my_tensor, sections=1)
# (tensor([[0.+0.j, 1.+0.j, 2.+0.j, 3.+0.j],
# [4.+0.j, 5.+0.j, 6.+0.j, 7.+0.j],
# [8.+0.j, 9.+0.j, 10.+0.j, 11.+0.j]]),)
my_tensor = torch.tensor([[True, False, True, False],
[False, True, False, True],
[True, False, True, False]])
torch.vsplit(input=my_tensor, sections=1)
# (tensor([[True, False, True, False],
# [False, True, False, True],
# [True, False, True, False]]),)
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