help with vectorizing a for loop

[Rick T]

Greetings All

I have a for loop that reads an array but I would like to vectorize it to see if will improve speed. at the moment the for loop takes about 7 mins any ideas to speed this up

The array called inner_freq has three columns made up of amplitude,frequency, and phase

for ii=1:1:length(inner_freq)-1

     aa_sig_rebuilt=inner_freq(ii,2)*cos(2*pi*t*inner_freq(ii,1)+inner_freq(ii,3));

     aa_sig_combined=aa_sig_combined+aa_sig_rebuilt;

end;

thanks