MATLAB: How to solve a linear system with component varying

linear systemmatrix

Hi all,
I have a 2×2 linear system where the 2×2 position has a imaginary number+variable. The the value from this variable "R" comes from another equation given by R=1.5*((1-S)./S) and S=-2:0.01:2. The system should look like this:
After that, i'll run another equation P=3*1.5*((1-S)./S)*abs(I2). I want to take the values from I2 to plot a graph by doing, plot(S,P).
Can someone help me how to solve this linear system? I've trying hard but no success.
Thans in advance!

Best Answer

Here is one way to do it;
index = 0;
S = -2:0.01:2;
for i = 1:length(S)
      index = index+1;
      s_val = S(i);
      R = 1.5*(1-s_val)/s_val;
      y = [380/sqrt(3); 0];
      A = [.45+.8i+25i -25i;-25i 1.5+1.5i+25i+R];
      x = A\y;
      I1(index) = x(1);
      I2(index) = x(2);
      P(index) = 3*1.5*((1-s_val)/s_val)*abs(I2(index));
end
plot(S,P)
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