How to temporarily pause execution of a function for troubleshooting

Hello Programmers,

I have sets of ODE equation that I am solving using ODE45.

For some unknown reasons, the model gives unrealistic result after 1600 seconds and the program terminates.

The model gives complex number as output.

I will like to pause the code as soon as any of the variable return a complex number and troubleshoot.

I used the "pause" command but i could not troubleshoot.

It is possible to do something like that in matlab

Answer 1

[Jan]

This is a job for the debugger:

if ~isreal(Variable)
  keyboard
end

Or:

if ~isreal(Variable)
  disp('problem reached')    % And set a breakpoint here
end

[Telema Harry]

Thank you.

Answer 2

[Matt J]

You can set conditional breakpoints,

https://www.mathworks.com/help/matlab/matlab_prog/set-breakpoints.html#buvvmfu-1

[Telema Harry]

Great information. Thank you