MATLAB: Overwrite and append files

text file

how do i overwrite or append files in matlab what functions should i be using?

To overwrite or create new file

fopen('FileName','w');

To append an existing file

fopen('FileName','a');

See

>> doc fopen

fid = fopen('hello.txt', 'a+');
fprintf(fid, '%d %d %d\n', v);
fclose(fid);

a=rand(4)
b=[1 2 3;4 5 6]
dlmwrite('file.txt',a)
dlmwrite('file.txt',b,'-append')