how to create a job or write on a matlab file?

i have a job from another software and is unknown for me, the quantity of variables depends of 'a' defined by a user, i need to create every job on a matlab file.

a=1;
matlabbatch{1}.spm.stats.factorial_design.dir = '<UNDEFINED>';
matlabbatch{1}.spm.stats.factorial_design.des.t1.scans = ...
   {'E:\archivos\proyecto de grado\cerebro\basic models\s3081-0003-00001-000001-01.nii,1'
    'E:\archivos\proyecto de grado\cerebro\basic models\s3400-0003-00001-000001-01.nii,1'};
matlabbatch{1}.spm.stats.factorial_design.cov.c = [2
                                                   2
                                                   2];
matlabbatch{1}.spm.stats.factorial_design.cov.cname = 'covOneSample';
matlabbatch{1}.spm.stats.factorial_design.cov.iCFI = 1;
matlabbatch{1}.spm.stats.factorial_design.cov.iCC = 1;

but if users input is 2 i need to create a file.m that contains this:

matlabbatch{1}.spm.stats.factorial_design.dir = '<UNDEFINED>';
matlabbatch{1}.spm.stats.factorial_design.des.t1.scans = {
  'E:\archivos\proyecto de grado\cerebro\basic models\s3081-0003-00001-000001-01.nii,1'
  'E:\archivos\proyecto de grado\cerebro\basic models\s3400-0003-00001-000001-01.nii,1'
  };
matlabbatch{1}.spm.stats.factorial_design.cov.c = [2
                                                   2
                                                   2];
matlabbatch{1}.spm.stats.factorial_design.cov.cname = 'covOneSample';
matlabbatch{1}.spm.stats.factorial_design.cov.iCFI = 1;
matlabbatch{1}.spm.stats.factorial_design.cov.iCC = 1;
matlabbatch{1}.spm.stats.factorial_design.dir = '<UNDEFINED>';
matlabbatch{1}.spm.stats.factorial_design.des.t1.scans = {
  'E:\archivos\proyecto de grado\cerebro\basic models\s3081-0003-00001-000001-01.nii,1'
  'E:\archivos\proyecto de grado\cerebro\basic models\s3400-0003-00001-000001-01.nii,1'
  };
matlabbatch{1}.spm.stats.factorial_design.cov(2).c = [2
                                                      2
                                                      2];
matlabbatch{1}.spm.stats.factorial_design.cov(2).cname = 'covOneSample';
matlabbatch{1}.spm.stats.factorial_design.cov(2).iCFI = 1;
matlabbatch{1}.spm.stats.factorial_design.cov(2).iCC = 1;

[Geoff Hayes]

Steven - can you describe what you mean by job?

[steven Garcia]

my software starts with BasicModels.m when you do click on covariables you can configure how many variables want to include and other things.

After you give values to the covariables then in BasicModels.m you select "oneSampleTtest" with the popupmenu1_Callback, i need to know how i can create a file whit the structure called matlabbatch{1}.

i hope you understand me, i will attach the files.

[Geoff Hayes]

Does this have to do with Simulink?

[steven Garcia]

no