running exe with system

Hi everybody,

I'm trying to run an .exe with the matlab system command.

The command line for this script (when I run it under dos, for instance) is

cpgi130.exe FILE.input OPTION1=10 OPTION2=20 OPTION3=40

What I want to do is running this command line into a for cycle with different input files for each step

I tried the following as explained in a previous post:

 mycomm = ['ChromosomeEL_33.fasta LENGTH=500 GC==55'];
 fid = fopen(fname, 'wt');
 fprintf(fid, mycomm) 
 fclose(fid);
 [status, result] =  system(['cpgi130.exe ' fname]);

It works only partially because I can input the system with the correct file but not the specified options. I know one should use the '<' to tell to system which option the .exe uses.

But how do I tell to system both the input file name AND the options?

Many thanks

Edoardo

Answer 1

[Michelle Hirsch]

I'm a little confused about your question. I would expect that you want to build a string that looks exactly like the one you would use at the DOS command line. Assuming that your challenge is just building this string, there are a couple of approaches.

You could keep concatenating the different options, e.g.

[status, result] =  system(['cpgi130.exe ' fname 'OPTION1=' num2str(500) ' GC=' num2str(55)]);

Though I would recommend that you try using sprintf to construct the command to pass to system instead of using []:

str = sprintf('cpgi130.exe %s OPTION1=%d OPTION2=%d ' ...
              'OPTION3=%d','myfile.txt',10,20,40);
[status, result] =  system(str);

The %s and %d mark places where you want to insert values into the string. Each one adds another input argument to the end of the call to sprintf in order, so the %s maps to the filename and the three %d's map to the option numbers. s=string, d=number.

Is this what you are looking for?

- scott