Thread Subject: Calling Matlab from C++ code

Hi,
I want to call my own matlab function from C++ code.
I found a way to do it using COM objects in code project:
http://www.codeproject.com/com/matlabengine.asp

This works for calling standard Matlab functions. What
should I do to call my own functions? where to put the .m
file?
I wanted also to know if the same will work in a computer
where only Matlab component runtime is installed (not
matlab).

p.s If there is another, easier way to do what I need (call
my own matlab functions from C++ and which will work with
MCR) it'll be also good.

Thanks alot

Hi Hisham,

All you need to do to call your own MATLAB m-function is to
have it in the MATLAB path, just like you would have to do
if you were using the MATLAB environment. You can call
addpath() on the COM object to add to the path. It may be
sufficient to just change the cwd of your C++ process.

I doubt you can use the COM object with just the MCR
installed, though I don't know for sure and would like to
find out.

reilly.


"Hisham " <hisham_abusaleh@hotmail.com> wrote in message
<f9pli8$594$1@fred.mathworks.com>...
> Hi,
> I want to call my own matlab function from C++ code.
> I found a way to do it using COM objects in code project:
> http://www.codeproject.com/com/matlabengine.asp
>
> This works for calling standard Matlab functions. What
> should I do to call my own functions? where to put the .m
> file?
> I wanted also to know if the same will work in a computer
> where only Matlab component runtime is installed (not
> matlab).
>
> p.s If there is another, easier way to do what I need
(call
> my own matlab functions from C++ and which will work with
> MCR) it'll be also good.
>
> Thanks alot

Hi,

I am experiencing the same problem. I am not a good C++
programmer and I have to make a plugin using Visual Studio
C++. To avoid C++, I wante to call matlab from C++ to do
my stuff and return the output to C++.

Could you please send me a template code , or one of your
codes where you did the same thing.

Regards




"John Reilly" <jrhokie1.nospam@yahoo.com> wrote in message
<f9s2m5$nri$1@fred.mathworks.com>...
> Hi Hisham,
>
> All you need to do to call your own MATLAB m-function is
to
> have it in the MATLAB path, just like you would have to
do
> if you were using the MATLAB environment. You can call
> addpath() on the COM object to add to the path. It may
be
> sufficient to just change the cwd of your C++ process.
>
> I doubt you can use the COM object with just the MCR
> installed, though I don't know for sure and would like
to
> find out.
>
> reilly.
>
>
> "Hisham " <hisham_abusaleh@hotmail.com> wrote in message
> <f9pli8$594$1@fred.mathworks.com>...
> > Hi,
> > I want to call my own matlab function from C++ code.
> > I found a way to do it using COM objects in code
project:
> > http://www.codeproject.com/com/matlabengine.asp
> >
> > This works for calling standard Matlab functions. What
> > should I do to call my own functions? where to put
the .m
> > file?
> > I wanted also to know if the same will work in a
computer
> > where only Matlab component runtime is installed (not
> > matlab).
> >
> > p.s If there is another, easier way to do what I need
> (call
> > my own matlab functions from C++ and which will work
with
> > MCR) it'll be also good.
> >
> > Thanks alot
>

Hi Hisham,

To call your own matlab function from C++ code, in a
computer without matlab:
1. Instal MCR.
2. compile your m function into exe file or dll file.
3. copy you compiled function in your c++ proyect
directory, and set the path in the environment variables.

This is the best way that recommend mathworks.
Regards,
Pedro