Troubleshooting PDEs in MATLAB: Why is My Function Not Affecting the Plot?

[member 428835]

Hi PF!

I am trying to solve a pde in MATLAB and started by using the generic code mathwork supplies and then augmenting for my purpose. After defining the function below and run the script, i can do anything to the $f$ and nothing changes. I can literally delete the line and still I receive the same plot. Any idea why?

function [c,f,s] = pdex1pde(x,t,u,DuDx)
c = 1;
f = DuDx;%pdedu/dx
s = u;

 

[FactChecker]

Sometimes when MATLAB compiles a function, it saves the compilation and will not recompile unless it knows the function has changed. Sometimes this goes wrong. I have had to remove compiled files from the directory to force MATLAB to recompile a new version. I forget what extension the compiled file had. I remember that I had a lot of problems when the files were on a network drive. Sometimes modification dates on network drive files do not get updated correctly to indicate a change.

 

[member 428835]

Do you know how to remove or where to look to remove compiled files from the directory to force MATLAB to recompile a new version?

Thanks for taking interest to this!

 

[FactChecker]

My memory is vague on this. Look in the same directory with your .m file that defines the function. It will have the same function name but will have a different extension.

 

[member 428835]

Thanks a ton!