Of course, there's a way to do it. Computers are particularly good at repeating the same task over and over.
It's not clear what variable you want to export to these 1200 or more files. Assuming you have a loop that creates a different A 1200 times
for fileidx = 1:1200
A = somefunctionthatcreateA();
save(sprintf('my_data_%04d.out', fileidx), 'A', '-ascii');
end
The important bit is the sprintf call to create the file name dynamically. The %04d in the formatspec converts the file index into a number string of 4 digits padded with zeros if necessary.
