sss Toolbox

sss is a MATLAB Toolbox adding sparse state space (sss) capabilities


Updated 11 Sep 2017

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The sss Toolbox expands the capabilities of the Control System Toolbox by allowing the definition of sparse state space (sss) objects as well as analysis function (such as bode, step, isstable etc.) tailored to exploit the sparsity of the system matrices whenever this is possible.
After installation, execute the "runme" function for initial setup, including the (optional) download of benchmark models and third party-software, such as the M-M.E.S.S. toolbox.

sss is now also available on GitHub at

Cite As

MORLab @ Chair of Automatic Control (2023). sss Toolbox (, MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2016b
Compatible with any release
Platform Compatibility
Windows macOS Linux

Inspired by: sssMOR Toolbox

Inspired: sssMOR Toolbox, psssMOR Toolbox

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Version Published Release Notes

+ updated mltbx file
execute "runme" after installation

+ replaced "loadSss" through "sss"
+ added +sssFunc namespace to use sss functions e.g. with ssRed objects (cp. sssMOR toolbox)
+ improved structure of simulation functions
+ added publishDoc.p and publishFunc.p

- lyapchol: changed definition of Cholesky (like) factors to be more consistent with literature
- residue: computing only a few poles/residues as in eigs
- sys.isSym property added
- second2first now gives [A,B,C,D,E] matrices as output