- ‘pinv’ requires costly SVD.
- ‘pinv’ does not work with sparse matrix.
Computing generalized Inverse of a square but sparse matrix?
46 ビュー (過去 30 日間)
古いコメントを表示
I am trying to find the generalized inverse of a square and sparse matrix. I am using Matlab, however pinv(matrix) doesn't work for sparse matrices. If you have any suggestion or algorithm, please share. Thanks in advance.
0 件のコメント
採用された回答
Rishabh Mishra
2020 年 12 月 21 日
Hi,
The disadvantages of using ‘pinv’ to find inverse of sparse matrix are:
Instead, you can use the function ‘pseudo-inverse’ for the same purpose. Refer the following link for documentation of ‘pseudo-inverse’ function.
Hope this helps!
0 件のコメント
その他の回答 (1 件)
Christine Tobler
2021 年 1 月 8 日
If you want to apply pinv(A)*b, you can instead use lsqminnorm(A, b), which also works for sparse matrices and does something equivalent (using QR decomposition instead of SVD).
0 件のコメント
参考
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!