Hi I have a question, I have to save to file the matrixs generated by an algoritm in Matlab. So i was wondering if is it possibile and how, to use in the filename a variable of the algoritm. Let's say "i" is the counter of my cicle and i would like to save the matrix generated at every cicle to a file with the name NAMEFILE-i. i.e. for i=1:4 a=i; save file-i a end Of course this is not working :-) Do i need to use a string?