I've been trying to plot the following figure for t, but I keep getting it wrong.

Writing it in terms of singularity function would be;

y(t) = 2u(t) - u(t-2) + u(t-4) - r(t-6)

Matlab;

function [y1] = y1(t)

y1 = y1 = 2*(t>=0 & t<2)-1*(t>=2 & t<4)+1*(t>=4 & t<6)+ (2)*(-t/3).*(t>=6 & t<8);

end

t = -10:0.01:10;

Y1 = y1(t);

plot(t,Y1); ylabel('y1(t)')

For some reason the unit step and ramp signals are always referring to the origin. And my ramp signal starts at -4 which I have no idea why.

Answer 1

[Rajani Mishra]

I have modified your code and plotted the result, Please refer below for the code:

function [y1] = y1(t)
y1 = 2*(t>=0) + -1*(t>=2) +1*(t>=4) + (2)*(-t/3).*(t>=6);
end 

Below is the result of the above code :