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Update Inverse Matrix

4.5 | 2 ratings Rate this file 6 Downloads (last 30 days) File Size: 2.84 KB File ID: #18063 Version: 1.0

Update Inverse Matrix


Yi Cao (view profile)


18 Dec 2007 (Updated )

update inverse of matrix after appending or reducing one coulmn and one row.

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Inverse calculation is expensive. However, if updating the inverse of a matrix appending or reducing one coulm and one row can be performed much fast. This package includes two small tools, invupdateapp and invupdatered, to update inverse much faster than directly calculation of the inverse. It is based on the block matrix formular. Other rank 1 update functions in MATLAB are qrupdate and cholupdate.

Both functions have been updated to improve performance and functionality.


This file inspired Inverse And Determinant Of Square Matrix, Inv Det 0(A), and Pseudo Inverse Update.

MATLAB release MATLAB 7.5 (R2007b)
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Comments and Ratings (2)
05 Apr 2009 V. Poor

19 Jun 2008 manish chopra

19 Dec 2007

Improve performence and functionality

20 Dec 2007

Change Category.

20 Dec 2007

Update help message.

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