Subscripted assignment dimension mismatch

clear all
cd('C:\Users\User\Desktop\smooth'),
listafile_rh=ls('C:\Users\User\Desktop\smooth');
qwe_rh=cellstr(listafile_rh)

ooo_rh=3
for uu_rh=1:4
    fileathand_rh=qwe_rh(ooo_rh)
    eval(['surface_rh{uu_rh}= spm_vol(''' cell2mat(fileathand_rh) ''');'])
    outputsubject_rh(:,uu_rh)= spm_read_vols(surface_rh{uu_rh})
    t= outputsubject_rh(:,uu_rh(:))       
    ooo_rh=ooo_rh+1
end

I get this error: Subscripted assignment dimension mismatch

Any Tips?

[Geoff Hayes]

Andrea - which line of code generates the error? Please copy and paste the full error message. Note that we don't have access to your file nor necessarily have the functions that you are using (spm_vol, spm_read_vols, etc.) so can't step through the code.

Also, try and avoid using eval There is usually an alternative to building commands dynamically...

[Andrea Vatulas]

The error is just: Subscripted assignment dimension mismatch

Could you advice me an alternative to build my code and avoid this error?

Thanks in advice

[Jan]

@Andrea: Do not just try to avoid eval but avoid it strictly. It causes much more troubles than it solves.

[Geoff Hayes]

Andrea - you will need to provide some context surrounding your code as it isn't clear how it is to be used (it doesn't help that the variable names are confusing). How are you using this code? Are you using Simulink? What is surface_rh?

[Andrea Vatulas]

spm_vol is a function header information for magnetic resonance file (extension .nii) spm_read_vols is a function for reading entire volumes