How to product two vector with difference sizes?

Question

Habib 2016-4-23

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/280586-how-to-product-two-vector-with-difference-sizes

编辑： Habib 2016-4-24

Hi,

I need to product two vector as Ta and r1 but I got error (In an assignment A(I) = B, the number of elements in B and I must be the same.). in fact, my goal is make iteration on all body of script. I couldn't understand what is wrong?

my codes is following as:

N=100;      a=0;    a1=10;         a2=5;
alfa=0.5*pi/180;
teta0=ones(1,3); L=ones(1,3); B=L;   Ta(:,:)=ones(1,3);
Roc=inf;  Rdisk=inf;   landa=1.03e-3;           k=2*pi/landa;
r1=linspace(a,a1,N);     r2=linspace(a,a2,N);
n=[1.45 1.8153 2.4];
for s1=1:size(n)
  teta0(s1)=(n(s1)-1)*alfa;       L(s1)=0.5*a1./teta0(s1);          B(s1)=L(s1);
  kernel12=ones(1,N,s1);           kernel21=ones(1,N,s1);
  H12=ones(1,N,s1);                H21=ones(1,N,s1);
  Ta(s1)=exp(-1i*2*teta0(s1)*k*r1);   
  Tdisk=exp(-1i*k*r2.^2/Rdisk);  
  Ttot=Ta(s1).*Tdisk(1:N);    
  Toc=exp(-1i*k*r2.^2/Roc);
end

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Answer 1

Azzi Abdelmalek 2016-4-23

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/280586-how-to-product-two-vector-with-difference-sizes#answer_219126

编辑：Azzi Abdelmalek 2016-4-23

在 MATLAB Online 中打开

Line 11 should be

Ta(s1)=exp(-1i*2*teta0(s1)*k*r1(s1));

You missed the index s1 in r1 (r1(s1) insteas of r1)

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Habib 2016-4-23

thanks,

I think it is couldn't best idea because the size of r1 is 1*200 and when we use r1(s1) instead of r1 only 3 elements of r1 selected because s1 is a 3 elements vector.

it is my idea and I don't know that it is true.

another problem, that I faced it, is kernel12(:,:,1)=0 and kernel12(:,:,2) has value, what is wrong? whereas it must has value.