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[http://gramian.de emgr] - '''Em'''pirical '''Gr'''amian Framework.
Empirical gramians can be computed for linear and nonlinear control systems for purposes of model order reduction or system identification.
The '''emgr''' framework is a compact open source toolbox for gramian-based model reduction and compatible with [http://www.gnu.org/software/octave/ OCTAVE] and [http://www.mathworks.de/products/matlab/ MATLAB].

== Features ==
'''emgr''' encompasses six types of gramians:

* Empirical Controllability Gramian
* Empirical Observability Gramian
* Empirical Cross Gramian
* Empirical Sensitivity Gramian
* Empirical Identifiability Gramian
* Empirical Joint Gramian

with sample implementations for:

* Balanced Truncation
* Direct Truncation
* Parameter Identification
* Parameter Reduction
* Combined Reduction
* Inverse Problems

== External Links ==
* http://gramian.de