HowToSD-ComfyUI-Pt-Wrapper/docs/reference/pt_index_select.md

Pt Index Select

Extracts elements from the input tensor along a specified dimension using an index tensor.

dim specifies the dimension along which the selection occurs.

• For example, for 2D tensors: ** If dim=0, index selects rows. ** If dim=1, index selects columns (for 2D tensors).

index is a list of indices that will be converted into a tensor.

Example:

Input Tensor:
[[1, 2, 3],
 [40, 50, 60],
 [700, 800, 900]]

index = "[0, 2]"
dim = 0

Output Tensor:
[[1, 2, 3],
 [700, 800, 900]]

Input

Name	Data type
tens	Tensor
dim	Int
index	String

Output

Data type
Tensor

---

Category: PyTorch wrapper - Indexing and Slicing Operations

ComfyUI Data Analysis Node Reference. © 2025 Hide Inada (HowToSD.com). All rights reserved.