A Fully Automated Flowgraph Analysis Tool for MATLAB

A handy signal flow graph analysis tool for exploring transfer function(s) of a given system.
Updated 10 Dec 2014

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This tool is based on a textual signal flowgraph (SFG) nodelist presentation of a system. This makes the exploring of the transfer function information quite fast and easy. Applicable for both continuous- and discrete-time systems. System can also be purely symbolic.
The tool reads a user-defined textual SFG which defines the signal flow graph of a system and then generates the needed transfer function(s). Alternatively outputs an SFG system matrix that can be used for further study.

The tool is generic so that it is easily applicable for many purposes. Tool can be applied to digital filter design, circuit design, delta-sigma modulator analysis or even reflection analysis s-parameter measurements in RF techniques and in optics.

The package includes 10 examples of nodelist files and some of them are presented in the manual. It also includes a useful extension for parameter extraction: a function for extracting a system of equations.

Requires Matlab 6 or higher and optionally control system toolbox (the tool has an optional output for an LTI-model).

Cite As

Marko Neitola (2024). A Fully Automated Flowgraph Analysis Tool for MATLAB (https://www.mathworks.com/matlabcentral/fileexchange/7224-a-fully-automated-flowgraph-analysis-tool-for-matlab), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2014b
Compatible with any release
Platform Compatibility
Windows macOS Linux
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Version Published Release Notes

-Manual update: help with older MATLAB versions
-System matrix as output option
-parameter solver replaced

Fixed a bug, thanks to the suggestion by Weiming XIONG.

A bugfix preventing errors caused by an ascii-character (carriage return).