Thread Subject: an exit(0) function

Hey, Is there some way in Matlab to use a C-style exit(0) function? The reason I ask, is I want to be able to break out of nested functions without displaying anything on the command line (as assert and error both do),

Thanks!

Chris <skynet414@gmail.com> wrote in message <2071624916.24176.1294959981193.JavaMail.root@gallium.mathforum.org>...
> Hey, Is there some way in Matlab to use a C-style exit(0) function? The reason I ask, is I want to be able to break out of nested functions without displaying anything on the command line (as assert and error both do),
>
> Thanks!

I am not a C expert, but I suspect the RETURN function could do what you want.

On 13/01/11 5:25 PM, Matt Fig wrote:
> Chris <skynet414@gmail.com> wrote in message
> <2071624916.24176.1294959981193.JavaMail.root@gallium.mathforum.org>...
>> Hey, Is there some way in Matlab to use a C-style exit(0) function?
>> The reason I ask, is I want to be able to break out of nested
>> functions without displaying anything on the command line (as assert
>> and error both do),
>>
>> Thanks!
>
> I am not a C expert, but I suspect the RETURN function could do what you
> want.

No, exit(0) corresponds to quit(). Yes, that does quit the matlab
session entirely, but then exit(0) in C ends execution of the executable
entirely and there is no equivalent in C to "return to the main
function" (though there the C setjump() longjump() )

There is no such thing as exit(0) in MATLAB. I've searched for two months for such a command with no results, and I'm 99% sure about it.

Chris <skynet414@gmail.com> wrote in message <2071624916.24176.1294959981193.JavaMail.root@gallium.mathforum.org>...
> Hey, Is there some way in Matlab to use a C-style exit(0) function? The reason I ask, is I want to be able to break out of nested functions without displaying anything on the command line (as assert and error both do),
>
> Thanks!

On 14/01/11 12:31 AM, Husam Aldahiyat wrote:
> There is no such thing as exit(0) in MATLAB. I've searched for two
> months for such a command with no results, and I'm 99% sure about it.

quit() is a pretty close approximation. You can't control the return
status, though.

It seems there is no such function, anyone have ideas on how I could create my own exit() function? I can't seem to find the source for quit() and error() which is annoying.

Also I found a bug in mlint after creating the script

disp(123)
quit cancel
disp(456)

MLint gives the warning that the disp(456) line can't be reached, but running the script prints 456!

Chris <skynet414@gmail.com> wrote in message <2071624916.24176.1294959981193.JavaMail.root@gallium.mathforum.org>...
> Hey, Is there some way in Matlab to use a C-style exit(0) function? The reason I ask, is I want to be able to break out of nested functions without displaying anything on the command line (as assert and error both do),
>

Why not use TRY/CATCH in the main function, rethrows the error if a real error occurs, and simply returns if the dummy error is detected.

Bruno

"Husam Aldahiyat" wrote in message <igoqj8$hnq$1@fred.mathworks.com>...
> There is no such thing as exit(0) in MATLAB. I've searched for two months for such a command with no results, and I'm 99% sure about it.

I have a project idea for you Husam. Extend your GOTO emulator to be able to jump any point to to another m file.

GOTO anothermfile:labelx;

Bruno

"Chris" <skynet414@gmail.com> wrote in message
news:777612481.26978.1295006293276.JavaMail.root@gallium.mathforum.org...
> It seems there is no such function, anyone have ideas on how I could
> create my own exit() function? I can't seem to find the source for quit()
> and error() which is annoying.

Those are built-in functions implemented in the source code for MATLAB, and
we do not share the source code for MATLAB.

> Also I found a bug in mlint after creating the script
>
> disp(123)
> quit cancel
> disp(456)
>
> MLint gives the warning that the disp(456) line can't be reached, but
> running the script prints 456!

Yes, this does seem like Code Analyzer assumes that anything after a call to
QUIT is unreachable and didn't take into account the 'cancel' input. Still,
you shouldn't be using "quit cancel" anywhere but your finish.m file, as it
doesn't do anything when used outside finish.m as per the documentation.

http://www.mathworks.com/help/techdoc/ref/quit.html

I'll note that to the development staff.

--
Steve Lord
slord@mathworks.com
comp.soft-sys.matlab (CSSM) FAQ: http://matlab.wikia.com/wiki/FAQ
To contact Technical Support use the Contact Us link on
http://www.mathworks.com

"Bruno Luong" <b.luong@fogale.findmycountry> wrote in message <igpgvg$9ji$1@fred.mathworks.com>...
> "Husam Aldahiyat" wrote in message <igoqj8$hnq$1@fred.mathworks.com>...
> > There is no such thing as exit(0) in MATLAB. I've searched for two months for such a command with no results, and I'm 99% sure about it.
>
> I have a project idea for you Husam. Extend your GOTO emulator to be able to jump any point to to another m file.
>
> GOTO anothermfile:labelx;
>
> Bruno

Not even close. Next update will allow a jump to a label in another code written in another language.