MATLAB: Variable in a string name

accessing filesfopenpathreading from filevariablevariables in string

I am reading columns of binary files to plot. I have all my files in one folder and I want to plot them and pull out certain data. How can I set up a loop that will go through all the files?
My idea so far:
1) Use D= dir('W:\Folder')
to retrieve the names of all the files
2) for i= 1:70
str = ('W:\Folder\D(i)\Data')
fid = fopen(str);
How can I insert the different names in the array D from step 1?
I tried sprintf but I believe there is a problem because it's a path.
Thank you for your help

Best Answer

Andrew - try using fullfile instead
 foldername = 'W:\folder';
 files      = dir(foldername);
 for k=1:length(files)
    % ignore directories
    if ~files(k).isdir
         % build the file name
         filename = fullfile(foldername,files(k).name);
         % open the file
         fid = fopen(filename);
         if fid>0
             % do stuff with file contents
             % close the file
             fclose(fid);
         end
    end
 end
You can use sprintf as well (something like str = sprintf('W:\folder\%s\,files(k).name)' but the above should work just as well.
Related Question