how to write file in userdefined directors using fopen/fwrite/fclose

Hi, I want to write file in user defined folder but not in matlab current directory. I tried to use following commands but no success, still writing into current matlab directory

P1=path;
path(P1,'C:\MATLAB701\work\user_defined');
files_out = dir(fullfile(matlabroot,'\work\user_defined/*.dat'));
filename = files_out(1).name;
outid = fopen(filename,'w+'); 
fwrite(outid,imagedata,'uint16');
fclose(outid);

Any help will be appreciable. Thanks, Rami

Answer 1

[Jan]

The dir command replies the file names without the path.

There is no need to add the folder to the path. Better:

folder = fullfile(matlabroot, '\work\user_defined\');
files_out = dir(fullfile(folder, '*.dat'));
filename = files_out(1).name;
disp(filename);  % Show the filename
outid = fopen(fullfile(folder, filename), 'w+'); 
fwrite(outid,imagedata,'uint16');
fclose(outid);

A general method to investigate such problems is the debugger. Set a break point inthe editor to the line, which behaves unexpectedly. Then Matlab stops at this break point and you can check the values of the variables in the command window.

[Rami]

Jan,

Thanks a lot for providing the commands and useful suggestion. Rami