Getting "Index exceeds the number of array elements" error and not sure why

I am writing a script to automatically sort files by a character string in the file name (i.e. sort by date). I am getting the following error:

"Index exceeds the number of array elements (1).

Error in sort_files (line 16)

movefile(fullfile(filelist(i).folder, filelist(i).name), [DiroUT,filesep,int2str(str2num(name(7:8)))]) "

I am just learning MATLAB and could use some advice.

DirIn = 'C:\Users\colbe\OneDrive\Documents\Backup\PhD Project Stuff\Soundscape Project\Experiment' %set incoming directory
DirOut = 'C:\Users\colbe\OneDrive\Documents\Backup\PhD Project Stuff\Soundscape Project\Experiment'

eval(['filelist=dir(''' DirIn '/*.wav'')']) %get file list


 for i = 1:length(filelist);
Filename = filelist(i).name
name = strsplit(Filename, '_');
newStr = extractBetween(name,7,8);


if strcmp(newStr,'01')
     movefile(fullfile(filelist(i).folder, filelist(i).name), [DirOut,filesep,int2str(str2num(name(7:8)))])
end

 end

[Walter Roberson]

Do not use eval()

Do use fullfile() . For example fullfile(DirIn, '*.wav')

You can only pass that strcmp() if name(7:8) is '01' so the movefile() can only execute in that case. So in the movefile(), name(7:8) is known to be '01' and str2num() of it will be 1 and int2str() of that is known to be '1' Therefore you can be sure that the right hand side will be the same as fullfile(DirOut, '1') . Is it intended that there is a subdirectory named 1 ? Is there any reason not to preserve leading 0's in the subdirectory name, directory 01 02 03 ... 09 10 11 and so on? That would sort in order when you used dir() whereas directory names 1 2 3 .. 9 10 11 would sort as 1 10 11 2 3 4 5 6 7 8 9

[Benjamin Colbert]

I think I have code to create the folders though I'm open to suggestions. And no, no reason to do 1 vs 01. You make a good point which I will implement. What I have is a folder of 4400 wav files (actually 2-4 folders every 2 months) and I want to auto sort them by date recorded (the 8-9 digits).

[Priyanshu Mishra]

If possible, can you give me the names of the files with which you have saved them in your folder?