If you want to save the file to a particular directory (i.e. the desktop) then you could do something like the following
directory = '/Users/geoff/Desktop';
filename = 'fileTest.csv';
fileDest = fullfile(directory,filename);
fid = fopen(fileDest, 'w');
if fid>0
% do your work
for i=1:1:1000
% stuff
end
% close the file
fclose(fid);
end
One thing you may want to consider in your code is to remove the repetitive opening of the file on each iteration of the loop
fid = fopen(outFileName, 'a');
While this is "allowed", there is no corresponding fclose(fid) for each fopen so you have multiple file descriptors for the same file which may lead to difficulty trying to open that file in another application - you will have to close all file descriptors or shut down MATLAB in order to view that file.
Since you already have the file descriptor from when you opened the file, then just re-use that one and don't try to get another.
And all iterations have been completed, close the file with fclose(fid), like in the sample code of this answer.
Try the above and see what happens!
EDIT check out fileDest once this variable has been initialized and observe the effect of fullfile (it will add the slash for you).
