Sparse Ops: Submatrixing

[jimjlu99]

🔨Work Item

IMPORTANT:

• This template is only for dev team to track project progress. For feature request or bug report, please use the corresponding issue templates.
• DO NOT create a new work item if the purpose is to fix an existing issue or feature request. We will directly use the issue in the project tracker.

Project tracker: https://github.com/orgs/dmlc/projects/2

Description

• A.submat(I, J), return induced submatrix (sparse)

Depending work items or issues

[yzh119]

I suggest unifying the interface with slicing:

A[row_indices, col_indices]  # get submatrix corresponding to given rows/cols.

[github-actions[bot]]

This issue has been automatically marked as stale due to lack of activity. It will be closed if no further activity occurs. Thank you