Vectors must be the same length.

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shiv gaur
shiv gaur 2022-1-27
评论： Rik 2022-1-27
theta=30:0.01:50;
lambda=633;
k0=2*pi/lambda;
e1=1.50^2;e3=1.33^2;e2=(0.12+1i*3.5)^2;
n1=1.50;n3=1.33;n2=0.12+1i*3.433;
d2=50;
n1=1.50;
x=n1*sind(theta);
k1=k0.*sqrt(e1.*mu1-x.^2);
k2=k0.*sqrt(e2.*mu2-x.^2);
k3=k0.*sqrt(e3.*mu3-x.^2);
q1=sqrt(e1-x.^2)./e1;
q2=sqrt(e2-x.^2)./e2;
q3=sqrt(e3-x.^2)./e3;
p=k2.*d2;
m111=cosd(p);
m112=-1i.*sind(p)./q2;
m121=-1i*q2.*sind(p);
m122=cosd(p);
Mtot=zeros(1,length(theta));
for j=1:length(theta)
M1=[m111(1,j),m112(1,j);m121(1,j),m122(1,j)];
Mtot=M1;
R(j) =((Mtot(1,1) +Mtot(1,2).*q3).*q1-Mtot(2,1) -Mtot(2,2).*q3)/(((Mtot(1,1) +Mtot(1,2).*q3).*q1+Mtot(2,1) +Mtot(2,2).*q3)).^2;
end
figure(1);
plot(theta,abs(R));
xlabel('incident angle');
ylabel('transmmission, s-pol');
plot is not showing any value error
Vectors must be the same length. pl help to plot
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shiv gaur
shiv gaur 2022-1-27
编辑：Rik 2022-1-27
Ran in:
without looping graph look like that but not rigt value of r is not greater than one file att
theta=40:80;
lambda=633;
k0=2*pi/lambda;
e1=1.50^2;e3=1.33^2;e2=(0.12+1i*3.5)^2;
n1=1.50;n3=1.33;n2=0.12+1i*3.433;
d2=50;
n1=1.50;
x=n1*sind(theta);
k1=k0.*sqrt(e1.*mu1-x.^2);
Unrecognized function or variable 'mu1'.
k2=k0.*sqrt(e2.*mu2-x.^2);
k3=k0.*sqrt(e3.*mu3-x.^2);
q1=sqrt(e1-x.^2)./e1;
q2=sqrt(e2-x.^2)./e2;
q3=sqrt(e3-x.^2)./e3;
p=k2.*d2;
m111=cosd(p);
m112=-1i.*sind(p)./q2;
m121=-1i*q2.*sind(p);
m122=cosd(p);
disp(m111)
%5Mtot=zeros(length(theta));
%R=zeros(length(theta));
%for j=1:length(theta)
%M1=[m111(1,j),m112(1,j);m121(1,j),m122(1,j)];
%Mtot=M1;
R=((m111 +m112.*q3).*q1-m121 -m122.*q3)./(((m111 +m112.*q3).*q1+m121 +m122.*q3)).^2;
%end
%R(j) =((Mtot(1,1) +Mtot(1,2).*q3).*q1-Mtot(2,1) -Mtot(2,2).*q3)/(((Mtot(1,1) +Mtot(1,2).*q3).*q1+Mtot(2,1) +Mtot(2,2).*q3)).^2;
%end
figure(1);
plot(theta,abs(R));
xlabel('incident angle');
ylabel('transmmission, s-pol');
but using loop there is problem pl help
Rik
Rik 2022-1-27
Have a read here and here. It will greatly improve your chances of getting an answer.
Please try to avoid duplicate posts.

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回答（1 个）

Walter Roberson
Walter Roberson 2022-1-27
Is it possible that you ran this code twice with more theta values the first time? You are not preallocating R so if you ran multiple times R would exist with the previous size.
It would be a good idea to preallocate R in your code.
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shiv gaur
shiv gaur 2022-1-27
whre to write the prelocation pl correct the code

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