How to plot Carrier and Message Signal

The first picture is the equation for carrier signal and the 2nd one is the message signal.

The ampltitudes for both (Ac and Am are 1), and the frequency for the carrier (fc) is given by the user, whereas the frequency for the message (fm) is 0.02.

However, I'm unsure in how to plot these two signals on top of each other. Am I doing the interval for the fplot correctly?

    fc = input('carrier frequency')
    fm = 0.02 %Hz
    Ac = 1;
    Am = 1;
    Ta = 1/fc; %period for carrier
    Tc = 1/fm;
    m = @(t) Am*cos(2*pi*fm*t);
    S = @(t) Ac*cos(2*pi*fc*t);
    subplot(3, 1 ,1);
    fplot(S, [0 Ta]);
    subplot(3, 1, 2);
    fplot(m, [0 Tc]);

Answer 1

[Abraham Boayue]

Try something like this :

    clear variables
    close all
  fc = input('carrier frequency')
      fm = 4 %Hz
      Ac = 1;
      Am = 1;
      Ta = 1/fc; %period for carrier
      Tc = 1/fm;
      N = 200;
      t0 = -2;
      t1 = 2;
      t = t0:(t1-t0)/(N-1):t1;
      m = Am*cos(2*pi*fm*t);
      S = Ac*cos(2*pi*fc*t);
  plot(t,S,'linewidth',2,'color','r')
  hold on
  plot(t,m,'linewidth',2,'color','b')
  legend('S(t)','M(t)')
  a= title('Carrier and Message Signals');
  set(a,'fontsize',14);
  a= xlabel('t [-2\pi 2\pi]');
  set(a,'fontsize',20);
  a = ylabel('y');
  set(a,'fontsize',20);
  a = zlabel('z');
  set(a,'fontsize',20);
  grid
  grid minor

Answer 2

[Kalpana]

fc = input('carrier frequency')

fm = 0.02 %Hz

Ac = 1;

Am = 1;

Ta = 1/fc; %period for carrier

Tc = 1/fm;

m = @(t) Am*cos(2*pi*fm*t);

S = @(t) Ac*cos(2*pi*fc*t);

subplot(3, 1 ,1);

fplot(S, [0 Ta]);

subplot(3, 1, 2);

fplot(m, [0 Tc]);