Please help me understand my homework

v(k+1)=v(k)+.0005(-.5*v(k)+c1*(75-v(k))+c2+h(k))

Create a MATLAB function CarOrbit.m with parameter inputs (c1, c2, hk) that plots the v(k) orbit. Plot the orbit for parameter values (c1, 0,−5). let c1=100, and determine stablity of the orbit

Here is the code i entered, and it kept giving me error message.

 function carorbit(V1,C1,C2,H1,N)
  V(1)=V1
  C(1)=C1
  C(2)=C2
  H(1)=H1
  t=[0:.01:N]
  for k=[1:N-1]
  V(k+1)=V(k)+.0005*(-.5*V(k)+C(1)*(75-V(k))+C(2)+H(k))
  end
  grid on
  plot(t,V)

Answer 1

[Honglei Chen]

It seems that you never compute your H(k). So once k>1, there is no value for H(k).

[Abdullah Tamimi]

awesome, so i changed H(k) to just H, and now it is telling me something about how it cannot plot because vectors are not the same

[Honglei Chen]

Well, your t is 0:0.01:N, which is 100*N+1 points long. But your V is only N points long, that's why they cannot be plotted. You redefine your t as 0:N-1, or 1:N, but it really depends your application.