First, MATLAB requires that subscripts (and indices) be integers greater than zero, so using ‘t’ as an index variable will not work.
Second, your ‘f’ calculation is vectorised at each iteration, producing a (1x10001) row vector. If you want to calculate and store all of them for each iteration of ‘n’, you have to account for that in your indexing.
Try this:
f(n,:)=ao + (an*cos(2*n*t))+(bn*sin(2*n*t));
with the plot call then being simply:
plot(t,f)
