Ploting a graph with if else statement

I am trying to plot this graph

 fs=100000000                % samples per second

 dt = 1/fs                  % seconds per sample

 StopTime = 5E-6             % seconds

 Fc = 5E6;                    % hertz

 for t = (0:dt:StopTime)    % seconds

 if t<1E-6 

 y = 2*sin(2*pi*Fc*t)

 else
           y=0
       end
   end
       plot (t,y)              % Plot the signal versus time

The output of y is exactly what I need but I am unable to plot the graph of the y output with respect to time.

Thank you,

Answer 1

[jonas]

Try this instead, no for loop needed

fs = 100000000                
dt = 1/fs                  
StopTime = 5E-6             
Fc = 5E6;                   
t = 0:dt:StopTime
y = nan(size(t))
y(t<1E-6) = 2*sin(2*pi*Fc*t(t<1E-6))
y(~(t<1E-6)) = 0
plot(t,y)              

[Ron]

Thank You this works!!

[jonas]

Happy to help! Don't forget to accept the answer please!