What is the meaning of the error " Inner matrix dimensions must agree".

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ARTI
ARTI 2014-1-5
回答： Wayne King 2014-1-5
here am attaching the program
if true
K=1.38*10^-23;
T=300;
q=1.6*10^-19;
Vt=K*T/q
Nde=2.7*10^19;
Vgs=2;
x=4.6;
Nsdx=Nsdp*exp((-x^2)/(2*lateralstraggle^2))
Nsdp=1*10^20;
eg=1.11;
Eg=1.17;
ni=8.3e9;
lateralstraggle=2;
Lg=70*10^-9;
epsilonox=4;
tsi=2*10^-9;
tox=1.2*10^-9;
epsilon=4;
epsilonsi=2;
Vds=0.1:10;
lambda=((epsilon*tsi*tox)/(2*epsilonox))^1/2
PI=(Vgs-Vfb)-lambda^2*q*(Na-Nsdx)/epsilonsi;
nieff=(ni^2*exp(eg/K*T))^1/2
Vbi=Vt*log(Nde*Na/nieff^2)
fi=Vt*log(Na/ni)
Vfb=1;
seff=log(Nde/Nsdp)*(-2*(lateralstraggle)^2)
leff=Lg-2*seff;
Deff=seff+leff
c2=((Vbi-PI)*(1-(exp(-Deff/lambda))/(exp(-seff/lambda))+Vds))/(exp(Deff/lambda))-(exp(seff/lambda))/(exp(-seff/lambda))*(exp(-Deff/lambda))
%c2=((Vbi-PI)*(1-(exp(-Deff/lambda))/(exp(-seff/lambda))+Vds)/exp(Deff/lambda)-(exp(seff/lambda)/(exp(-seff/lambda)))*exp(Deff/lambda))
c1=(Vbi-c2*exp(seff/lambda)-PI/(exp(-seff/lambda)))
sif=c1*exp(-x/lambda)+c2*exp(x/lambda)+PI;
Na=(ni^2/Na)*exp(sif/Vt);
Vth=Vfb+2*fi-c1*exp(-xmin/lambda)-c2*exp(xmin/lambda)+(lambda^2*q*(Na-Nsdxmin)/epsilonsi);
plot(lateralstraggle,Vth)
ylabel('Vth, V')
xlabel('lateralstraggle,nm')
end
  1 个评论
Wayne King
Wayne King 2014-1-5
If you want somebody to help you, you need to define all the variables which you are using.
For example, you cannot possibly really be defining Ndsp in the line after you use it.
Nsdx=Nsdp*exp((-x^2)/(2*lateralstraggle^2))
Nsdp=1*10^20;
Also, how are we supposed to know what Vfb is?

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回答（1 个）

Wayne King
Wayne King 2014-1-5
That error comes from multiplying matrices which are not conformable,
randn(2,3)*randn(2,3)

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