how to give path of the input and output files in matlab?

i have a M file in FOLDER_1...in that i coded to process some files in FOLDER_2 and i need to store the output files in FOLDER_3..i given the path in M file. .below is my code...i am stuck here..help needed my current folder(where my .m file is) is: 'C:\Users\FOLDER_1\

    path_01 = 'C:\Users\FOLDER_2\';
path_02 = 'C:\Users\FOLDER_3\';
mkdir(path_01,'FOLDER_3');
Filelist = dir(fullfile(path_01, '*.ascii'));
for i = 1:length(Filelist)
     filename_out = fullfile(path_02, [Filelist(i).name]);
     RD=load(Filelist(i).name);
     GO=load('Chlis.txt'); 
    nrec=size(RD,1);
     nchl=size(GO,1);
   for i = 1:nrec,
     for j = 1:nchl,
        RD(i,j)=RD(i,j)*GO(j,2)+GO(j,3);
     end 
   end  

dlmwrite(filename_out,RD,'delimiter', '\t', ...
       'precision', '%.6f');

getting error as:

   ??? Error using ==> load
Unable to read file datafile.ascii: No
such file or directory.

Error in ==> ascii at 8 RD=load(Filelist(i).name);

[lvn]

Can you remove the ; at the end of this line and tell us what it gives?

filename_out = fullfile(path_02, [Filelist(i).name])

[sandy]

same error

   ??? Error using ==> load
Unable to read file datafile.ascii: No
such file or directory.
Error in ==> ascii at 8 RD=load(Filelist(i).name);

[sandy]

my file to load is inside the path_01(datafile.ascii)..its not loading actually.. also note..if i place my input file in FOLDER_01,its working.but its not loading input file from FOLDER_2(in path_01...)any path of files to be changed..?

[lvn]

Yes but I meant, if you remove the ';' you will get additional output on the screen which can help in answering your question.

Have you checked whether Filelist(i).name is actually what you expect it is?

[sandy]

yes..Filelist(1)name is datafile.ascii...if you see the error.its identifying the file.but not loading by load() function at error line...code is running fine only if i keep M file and input file(datafile.ascii) in same folder location.but i split them in different folder..this error strikes..

[lvn]

Ah i see now,

RD=load(Filelist(i).name);

should probably be

RD=load(fullfile(path_01, [Filelist(i).name]));

and

filename_out = fullfile(path_02, [Filelist(i).name]);

should probably be

filename_out = fullfile(path_03, [Filelist(i).name]);

[sandy]

brilliant...it works ivn...thank you...