MATLAB: Renaming Files After Unzip

deletefor looplooprenameunzip

Hello,
I have the following code below that works just fine for unzipping and deleting files.
files = fullfile(matlabroot, '\toolbox');
if ~exist(files, 'dir')
	files = matlabroot;
end
uiwait(msgbox('Pick a folder on the next window that will come up.'));
selpath = uigetdir(files);
if selpath == 0
	return;
end
projectdir = selpath;   
dinfo = dir( fullfile( projectdir, '**', '*.zip') );   %find all .zip underneath the projectdir.

%then

for K = 1 : length(dinfo)
      unzip(fullfile(dinfo(K).folder,dinfo(K).name),selpath);
end
files = dir(projectdir);
deletedfiles = 0;
for itr = 1:length(files)
    if files(itr).bytes<500000 && ~files(itr).isdir 
        files.name
        delete(fullfile(files(itr).folder, files(itr).name))
        deletedfiles=deletedfiles+1;
    end
end
deletedfiles
But, after I want to rename the files, so after the unzip loop, I made this changes.
files = fullfile(matlabroot, '\toolbox');
if ~exist(files, 'dir')
	files = matlabroot;
end
uiwait(msgbox('Pick a folder on the next window that will come up.'));
selpath = uigetdir(files);
if selpath == 0
	return;
end
projectdir = selpath;   
dinfo = dir( fullfile( projectdir, '**', '*.zip') );   %find all .zip underneath the projectdir.
%then
for K = 1 : length(dinfo)
      unzip(fullfile(dinfo(K).folder,dinfo(K).name),selpath);
end
for id = 1:length(files)
    % Get the file name (minus the extension)
    [~, f] = fileparts(files(id).name);
      % write the rename file 
      rf = strcat('Flight_10001',ext) ;
      % rename the file 
      movefile(files(id).name, rf);
end
files = dir(projectdir);
deletedfiles = 0;
for itr = 1:length(files)
    if files(itr).bytes<500000 && ~files(itr).isdir 
        files.name
        delete(fullfile(files(itr).folder, files(itr).name))
        deletedfiles=deletedfiles+1;
    end
end
deletedfiles
and got this following errror
Struct contents reference from a non-struct array object.
Error in UnzipnDelete (line 18)
    [~, f] = fileparts(files(id).name);
Any ideas how to fix this? I just want to rename it to "Flight 10001, Flight 10002, and so on"

Best Answer

files = fullfile(matlabroot, '\toolbox');
So files is a character vector at that point.
files = dir(projectdir);
Eventually you assign the result of dir() over top of the character vector. But before that, it is a character vector.
[~, f] = fileparts(files(id).name);
And that line is before you assign the result of dir() to files
unzip(fullfile(dinfo(K).folder,dinfo(K).name),selpath);
That tells unzip to write the files into the directory indicated by selpath, which is not likely to be the current directory.
[~, f] = fileparts(files(id).name);
If you were to replace files with a variable that you had assigned the results of a dir() call into, then that line in itself would potentially be valid. It is completely valid to use fileparts() on a character vector that refers to a file that is not in the current directory.
movefile(files(id).name, rf);
If you were to replace files with a variable etc., etc., then the line would still need work.That line requires that the given file is located in the current directory, which will not be the case -- the file is over in selpath
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