问题
So I'm trying to use the octave debugger to detect where division by zero happens. For that it seems logical to use "debug_on_warning ()". However I'm just not understanding how to use this function call. I mean should I place it in the script somewhere? but then how would the debugger start? an example would be great!
回答1:
Take a look at the Debugging section of the Octave manual.
For your case, you should place debug_on_warning (1) at the top of your script so it stops when the warning happens and drops you in debug mode. Then type dbwhere to find out where you are.
An alternative, that's the way I do it, leave the command keyboard in certain areas where you think the problem may be. Then use dbstep to evaluate your script line by line.
回答2:
Solution for setting a breakpoint in octave
Set breakpoint in file myOctaveCode.m in line 18
dbstop myOctaveCode 18
Call function
myOctaveCode
Debugger stops
stopped in /.../myOctaveCode.m at line 18
...
Now I can use the debugger
debug> who
Variables in the current scope:
...
When calling dbstep I will jump to the next line
debug> dbstep
Documentation: https://octave.org/doc/v4.4.1/Debug-Mode.html#Debug-Mode
Remark
My answer just fits to the question's title. It's not an exact answer for the question. But I hope it might help others who stumble upon that question while searching for general octave debugging hints. So please do not vote me down.
来源：https://stackoverflow.com/questions/20348811/how-is-the-octave-debugger-used