Help using an If statement with arrays

Create a plot of iD as a function of vDS from 0 ≤ vDS ≤ 8 V, for three values of vGS =2, 3, and 4 V.

Constants: Kn=0.2 mA/V2; VTN =1.2 V; λ=0.01 V-1.

Here is my work I have so far:

Vds = 0:0.1:8;            
Vgs = 2:1:4;              
kn = 0.2;                 
Vtn = 1.2;                
lambda = 0.01;            
Vds_Sat = Vgs - Vtn;
if (Vds <= Vds_Sat)  
  ID = Kn*(2*(Vgs-Vtn)*Vds - (Vds.^2));
else (Vds >= Vds_Sat)
  ID = Kn*((Vgs - Vtn).^2*(1 + lambda * Vds));
end
plot(Vds,ID)

[Walter Roberson]

duplicates http://www.mathworks.com/matlabcentral/answers/59464

Answer 1

[Matt J]

Seems like this was already answered here

http://www.mathworks.com/matlabcentral/answers/59464#comment_124085