Identifiability, controllability & observability detection.

Highly efficient identifiability, controllability & observability detection of large-scale nonlinear dynamical systems.

https://gvw007.yolasite.com

Version 1.3.0 (56.5 KB)
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22 Apr 2026

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Highly efficient identifiability, controllability & observability detection of large-scale nonlinear dynamical systems.
Software associated with the paper:
L.G. Van Willigenburg, J.D. Stiger, J. Molenaar, 2022, "Sensitivity matrices as keys to local structural system properties of large-scale nonlinear systems" Nonlinear Dynamics, a Springer Nature journal. A PDF can be downloaded from
https://gvw007.yolasite.com/resources/Sensitivities-as-keys-NonlinDyn-2022!Errata.pdf
Documentation: readme.m

Cite As

Gerard Van Willigenburg (2026). Identifiability, controllability & observability detection. (https://au.mathworks.com/matlabcentral/fileexchange/106000-identifiability-controllability-observability-detection), MATLAB Central File Exchange. Retrieved .

General Information

MATLAB Release Compatibility

  • Compatible with any release

Platform Compatibility

  • Windows
  • macOS
  • Linux
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Version Published Release Notes
1.3.0

nlident now properly handles indices to be estimated initial state variables as in the additional example on identifiability of the NFKappaB model. Plots have been improved. Sundials integrators are now supported too.
1.2.5

Link updated
1.2.4

Link updated
1.2.3

figureFullScreen deleted figure used
1.2.2

Line 92 of fxusen.m updated to also include uxNtr. Makes a difference only when nx0=1 is selected as an input to nlacchs. Instead of local strong accessibility this checks local accessibility.
1.2.1

The number of samples ns making up the sensitivity matrices in nlacchs, nlident is by default set to nx, npx, the maximum if all but one input/parameter is "disconnected". Script exmrhs now also calls function nlacchs.
1.2.0

The number of default samples ns to build the sensitivity matrix in nlacchs is updated to not depend on the number of system inputs nu (since an arbitrary number of inputs may be disconnected causing uncontrollability).
1.1.0

Update readme, dnkwbl64 (correction obtained from Jinrae Kim), nlacchs (output argument uxNcr added).
1.0.0