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Help using an If statement with arrays

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Steven
Steven 2013-1-21
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)

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Matt J
Matt J 2013-1-21

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