number of elements in B and I must be the same?

Question

Kevin 2014-7-21

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https://ww2.mathworks.cn/matlabcentral/answers/142741-number-of-elements-in-b-and-i-must-be-the-same

编辑： Matt J 2014-7-21

采纳的回答： Matt J

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Hi,

For the following line of code:

for i=1:length(C_T)
   if  C_T(i) > 0.96;
      axial_induction(i) = 1 ./ (((4.*F.*cos(relative_wind)) ./ (sigma.*Cl))-1);
     else
         axial_induction(i) = 1 ./ (1+(4.*F.*(sin(relative_wind)^2)) ./ (sigma.*Cl*cos(relative_wind))); 
     end;
  end;

I am getting the following error:

In an assignment A(I) = B, the number of elements in B and I must be the same.

Error in BEM (line 79) axial_induction(i) = 1 ./ (((4.*F.*cos(relative_wind)) ./ (sigma.*Cl))-1);

I am trying to calculate 'axial_induction' at various points along a blade section and the equation which I use depends on the 'C_T' value. Could anyone please help me with this?