renaming NII files according to a string of values

I have a string:

cond = [string('CSRA_Rcon');  string('CSRA_Rinc');  string('CSRA_Ucon')];

and .NII files (betas from the spm fmri: beta0001.nii, beta0002.nii, beta0003.nii) that I want to rename according to the string, so the names would be: CSRA_Rcon.nii, CSRA_Rinc.nii, CSRA_Ucon.nii.

What's the optimal way of doing it?

[Guillaume]

I would think that

cond = string({'CSRA_Rcon'; 'CSRA_Rinc'; 'CSRA_Ucon'});

would be an easier way to create your string array.

How do you determine that 'beta0001.nii' has to be renamed to 'CSRA_Rcon.nii' ? How are the original names obtained in the first place? Is it another string array that you create or are they retrieved by dir? If the latter what defines the order?

[Mariam Kostandyan]

The files are retrieved by dir. So, I just set the path to the folder where the files are. The order of the files is defined by their names: beta0001, beta0002, beta0003, beta0004, etc. Importantly, the order of the files corresponds to the order of the values in the string array.

Answer 1

[Walter Roberson]

cond = {'CSRA_Rcon', 'CSRA_Rinc', 'CSRA_Ucon'};

dinfo = dir('beta*.nii');
nfiles = length(dinfo);
if nfiles ~= length(cond)
  error('Number of available files does not match number of available names, nothing renamed');
end

for K = 1 : nfiles
  movefile(dinfo(K).name, cond{K});
end

[Mariam Kostandyan]

thank you a lot! It worked!