Need help to plot sawtooth wave Matlab

Hello everyone! Thank you all for your help in advance. I have a HW problem that asks to create sawtooth plot using the following: SUM where n=1,2,3,4.... of

(amp/(n*pi))*sin(2*pi*n*frequency*time);

Can anyone tell me if this equation by itself can produce sawtooth plot? Does it need any mods to produce necessary graph. P.S. no use of sawtooth built in functions. Thank you all !

Answer 1

[Geoff Hayes]

Jeff - I think that it is almost the sawtooth just missing an amp/2 factor which you then subtract the above sum from. See sawtooth for details.

To see the sawtooth take shape as n increases, try the following code

 close all;
 figure;

 % define the number of samples per second
 Fs = 8192;

 % create your one second time vector
 t  = linspace(0,1-1/8192,Fs);

 % define your frequency and amplitude
 f   = 2;
 amp = 1;

 % plot dummy data
 h=plot(NaN,NaN);

 res = amp/2;

 for k=1:n
    res = res - (amp/(k*pi))*sin(2*pi*k*f*t);
    set(h,'XData',t,'YData',res);
    pause(0.1);
 end

[Jeff]

It works! Just needed n values. I have been beating around the bush for some time now, you are awesome and I really appreciate your help. Thank you!