matlab fopen()

file=dir('/home/wang/Desktop/trainset/others/');
for i=:length(file)
     path= strcat('/home/wang/Desktop/trainset/other/',file(i).name,'\n');
     %save('/home/wang/Desktop/trainsetimage_name');
     %save result.txt  -ascii path
     fid=fopen('./result4.txt','a');
     fprintf(fid,path);
end