VFGEN § DDE-BIFTOOL

DDE-BIFTOOL

DDE-BIFTOOL is a MATLAB package for bifurcation analysis of delay differental equations.

The VFGEN DDE-BIFTOOL Command

A set of MATLAB files configured for the DDE-BIFTOOL package are created by the command

$ vfgen ddebiftool vector_field_file.vf

The vector field must have at least one delay expression.

Note: Currently VFGEN only generates DDE-BIFTOOL files for systems with constant delays.

Options

path

The path option allows the user to specify a directory that is added to the MATLAB search path in the sys_init.m file. For example, if the VFGEN command

$ vfgen ddebiftool:path="/home/wweckesser/ddebiftool" sc2000.vf

is given, the line

    path(path,'/home/wweckesser/ddebiftool');

is added to the sys_init.m file.
Default: If the path option is not used, the following comments are added to sys_init.m:

    # Add the DDE-BIFTOOL path here, if necessary.
    # path(path,'');

Example

The file mg.vf defines the Mackey-Glass equation. The command

vfgen ddebiftool:path=/home/wweckesser/ddebiftool mg.vf

creates the files

The script mg_script.m results in the following plot: