Multiple eigen-values for 2x2 and 3x3 matrices

Version 2.1.0.0 (6.29 KB) by Bruno Luong
Compute in one shot the eigen-values of multiples (3 x 3) matrices using Cardan's formula
4.6
(7)
1.9K Downloads
Updated 26 Mar 2021

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Note that this function do not return EIGEN VECTORS.

This function is faster than looping on EIG when eigenvalues must be computed for a large number of matrices. The test shows it can speed up by 10 times

Cite As

Bruno Luong (2026). Multiple eigen-values for 2x2 and 3x3 matrices (https://nl.mathworks.com/matlabcentral/fileexchange/27680-multiple-eigen-values-for-2x2-and-3x3-matrices), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2010a
Compatible with any release
Platform Compatibility
Windows macOS Linux
Categories
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Eig3Folder

Version Published Release Notes
2.1.0.0

Eigen vectors can be now computed.
For dimension 3 it requires https://www.mathworks.com/matlabcentral/fileexchange/68976-multipleqr
1.3.0.0

Extend for 2x2 matrices
1.2.0.0

Extend to complex matrices as well
1.1.0.0

Speed improvement
1.0.0.0