how to add the input filenames correctly for a .exe in matlab?

Hello, anyone can help? I made a .exe file for my matlab functions using the MATLAB COMPILER. While when I use "system" command to run this .exe with inputs specified, I got an error saying the file cannot be read:

Error at line 19 has code like this:

Rrs412=double(hdf5read(fname_oc,'/bands/Rrs_412')).*slope_oc+intercept_oc;

fname_oc is my input file with command:

[status, result] =  system(['cal_sss_sat_gom.exe fname_sst fname_oc']);

I am pretty sure the file path and file name are correct, when I type command the following command separately under the command line:

Rrs412=double(hdf5read(fname_oc,'/bands/Rrs_412')).*slope_oc+intercept_oc;

it works perfect.

Below is some code of my function:

==================================================

function SSS = sss_MODIS_NN(fname_sst,fname_oc) slope_oc=1; intercept_oc=0; slope_sst=1; intercept_sst=0; Rrs412=double(hdf5read(fname_oc,'/bands/Rrs_412')).*slope_oc+intercept_oc; Rrs443=double(hdf5read(fname_oc,'/bands/Rrs_443')).*slope_oc+intercept_oc; Rrs488=double(hdf5read(fname_oc,'/bands/Rrs_488')).*slope_oc+intercept_oc; Rrs555=double(hdf5read(fname_oc,'/bands/Rrs_555_ocean')).*slope_oc+intercept_oc; Rrs667=double(hdf5read(fname_oc,'/bands/Rrs_667')).*slope_oc+intercept_oc; sst=double(hdf5read(fname_sst,'/bands/sst')).*slope_sst+intercept_sst;

...

===============================================================

Anyone can help me? I have been struggling on this for a few days... Thank you very much!

Best,

Cathy

Answer 1

[Walter Roberson]

When you build an executable with MATLAB Compiler, it starts running with a current directory that is the place the executable was installed.

http://blogs.mathworks.com/loren/2008/08/11/path-management-in-deployed-applications/

[Cathy Chen]

Yes, I know that. Actually the filenames I specified has full path. In my understanding, it should work no matter where I put those files as long as I give the full path.

I run the command line

[status, result] = system(['cal_sss_sat_gom.exe fname_sst fname_oc']);

under the folder where my .exe file is stored. I still do not know why the file cannot be read...

[Walter Roberson]

I suggest you modify the system() call to put in the full file name for the last item in the command. For example sprintf() together the command. Remember to put in quotes around the name in case there is a space in the directory name

[Cathy Chen]

Thanks for the help. Yes, now the reading error disappeared.

However, nothing is returned in the result. If it works properly, in the 'result', there should be a 2 dimensional data array.

I am thinking, can this work out my problem? As at the beginning, I want to make a binary executable file for my function, and my function has 2 input files, the output is a 2 dimensional data array. When I use the MATLAB COMPILER to generate the .exe file, and use 'system' to run it, I suppose the output data array is stored in 'result'. But it seems not the case.

Any clue about this? Thank you very much!

[Walter Roberson]

The second output of system() is the text that would have gone to the command window. If you are calculating something numeric and not displaying it then system() is not going to be able to return it.

MATLAB Compiler SDK would be more natural for your problem, if what you want is something that can be called from MATLAB to return a numeric variable.

[Cathy Chen]

Thank you very much, Walter. I have made my function without any output, now it works perfect using the MATLAB compiler instead of Matlab compiler SDK.

While I came up with another question, currently I can only run this compiled .exe file under the path where the .exe file is stored, which means if I share this .exe with others, they can only use it under the path where they put it. I am wondering, is it possible to put it into my Matlab library, in this way, it would work like an intrinsic .exe file, so I can run it under any working path? Any clue about this? Many thanks!