# DIFFERENTIAL EQ. SOLUTION THROUGH S-FUNCTION

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Solution of differential equation through S-Function
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Updated 25 Oct 2008

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Basic example for beginners, that shows how to solve the differential equation through S-Function
****************DIFFERENTIAL EQ. SOLUTION THROUGH S-FUNCTION******************

***************"Instructions for Simulink"*************************

1.Goto simulink library browser and expand "Simulink"

2.Goto "user defined function" and expand it

3.Drag "S-Function" in the simulink enviorment

4.Double click and name the "S-Function name" as your save S-Function file, like "example" in this case

(**Make sure your both files are saved in same directory and their name dont overlap with any other file name)

*************Instruction for Matlab*******************

1.Type "open sfunctmpl" in command to open new S-Function
2.Save it as your own file,like "example" in this case;
3.Change the function name as your file name
4.In "function sys=mdlDerivatives(t,x,u)" you will define the differential eq
5.In "function [sys,x0,str,ts]=mdlInitializeSizes" you will define the continous states, inputs from simulink block and output.
6.In "function [sys,x0,str,ts]=mdlInitializeSizes" you will define Initial conditions of differential eq
7.In "function sys=mdlOutputs(t,x,u)", you will declare the outputs

*************************************************************************************

### Cite As

Qadeer Ahmed (2024). DIFFERENTIAL EQ. SOLUTION THROUGH S-FUNCTION (https://www.mathworks.com/matlabcentral/fileexchange/21885-differential-eq-solution-through-s-function), MATLAB Central File Exchange. Retrieved .

##### MATLAB Release Compatibility
Created with R2006b
Compatible with any release
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1.0.0.0