Mathematics

DDE Function Summary

DDE Initial Value Problem Solver

Solver	Description
dde23	Solve initial value problems for delay differential equations with constant delays.

DDE Helper Functions

Function	Description
deval	Evaluate the numerical solution using the output of dde23.

DDE Solver Properties Handling

An options structure contains named properties whose values are passed to dde23, and which affect problem solution. Use these functions to create, alter, or access an options structure.

Function	Description
ddeset	Create/alter the DDE options structure.
ddeget	Extract properties from options structure created with ddeset.

DDE Initial Value Problem Examples

These examples illustrate the kind of problems you can solve using dde23. Click the example name to see the code in an editor. Type the example name at the command line to run it.

Note    The Differential Equations Examples browser enables you to view the code for the DDE examples, and also run them. Click on the link to invoke the browser, or type odeexamples('dde')at the command line.

Example	Description
ddex1	Straightforward example
ddex2	Cardiovascular model with discontinuities

Additional examples are provided with the tutorial by Shampine, Thompson, and Kierzenka, "Solving Delay Differential Equations with dde23." The tutorial and the examples are available at ftp://ftp.mathworks.com/pub/doc/papers/dde/. This tutorial illustrates techniques for solving nontrivial real-life problems.

Initial Value Problems for DDEs

Introduction to Initial Value DDE Problems