[rootDirCoP, namesCoP] = getFileNames; for file = 1:length(namesCoP) subNum = char(namesCoP(file)); subNum = subNum(1:5); subNumsCoP(file, :) = subNum; end [rootDirRAW, namesRAW] = getFileNames; for file = 1:length(namesRAW) subNum = char(namesRAW(file)); subNum = subNum(1:5); subNumsRAW(file, :) = subNum; end