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debuggingmatlab
C. Reed
C. Reed

Reputation: 2452

(Re)starting Matlab after error from error location

I'm debugging a matlab script that takes ~10 minutes to run. Towards the end of the script I do some i/o and simple calculations with my results, and I keep running into errors. Is there a way to start matlab from a certain sport in a script after it exits with an error--the data is still in the workspace so I could just comment out all of the code up until the error point, but I'm wondering if anyone knows a better way to go about doing this without rerunning the entire script (the ultra-lazy/inefficient way)?

Thanks,

Colorado

Upvotes: 2

Views: 1671

Answers (2)

Jacob
Jacob

Reputation: 34601

Yes, use dbstop. Type dbstop if error and then run your script. The minute it hits an error, it will create a breakpoint there and you're in the workspace of the script --- which means you can debug the error, save data ; anything you want! Here's a snippet from the documentation for dbstop if error --- there are other ways to do dbstop, so do check it out:

dbstop if error

Stops execution when any MATLAB program file you subsequently run produces a run-time error, putting MATLAB in debug mode, paused at the line that generated the error. The errors that stop execution do not include run-time errors that are detected within a try...catch block. You cannot resume execution after an uncaught run-time error. Use dbquit to exit from debug mode.

Upvotes: 4

Karl
Karl

Reputation: 9155

Double percent signs will enable 'cell mode' which lets you run little blocks of code in steps. Sounds like just what youre looking for.

Upvotes: 3

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