MATLAB: How to plot c(t) vs t

plot

How to plot c(t) vs t with these parameters for various values of v
c(t)=c0-c03*k*(1/cmin-1/cmax)*v*u(t)
where,
u(t)=1,  t≥0
         0, t<0
Cmin=10e-9
Cmax=10e-6
C0=100e-9
K=10e6
Thanks in advance

Best Answer

I would first define a function as follows:
function y = Cfun(t, v)
   u = double(t>=0);
   Cmin = 10e-9;
   Cmax = 10e-6;
   C0 = 100e-9;
   K = 10e6;
   C03 = C0;  % I don't know what C03 is, so I set it the same as C0.
   y = C0-C03*K*(1/Cmin-1/Cmax)*v*u;
end
Then, create a different MATLAB file with the following code
t = linspace(-10,10,100);
y = [];
for v = [1,5,-1,-5]
 y = [y; Cfun(t,v)];
end
plot(t,y(1,:),t,y(2,:),t,y(3,:),t,y(4,:))
legend('v=1', 'v=5', 'v=-1', 'v=-5')
Then, you should be able to see the figure as expected.
-Yu
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