How to simplify code into a for loop?

2022 2 23
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更新时间：2022 2 23
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I am creating the transfer functions for the different stories of the model for a buidling. My code is quite heavy, and it is very tedious to keep adding lines of code when I want to model more floors.
Is there anyway I can implement this code into a for loop?
a1=phi(1,1);
a2=phi(2,1);
a3=phi(3,1);
a4=phi(4,1);
q1_f=a1./(M_diag(1,1)*s.^2+C_diag(1,1)*s+K_diag(1,1));
q2_f=a2./(M_diag(2,2)*s.^2+C_diag(2,2)*s+K_diag(2,2));
q3_f=a3./(M_diag(3,3)*s.^2+C_diag(3,3)*s+K_diag(3,3));
q4_f=a4./(M_diag(4,4)*s.^2+C_diag(4,4)*s+K_diag(4,4));
M_diag, C_diag, K_diag are 4x4 matrices that have been previously defined.
Thank you!

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Jan
Jan 2022-2-23
编辑：Jan 2022-2-23

0 个投票

M_diag = rand(4,4);
C_diag = rand(4,4);
K_diag = rand(4,4);
a = phi(1:4, 1);
q_f = a ./ (diag(M_diag) .* s .^ 2 + diag(C_diag) .* s + diag(K_diag));
There is no need for a loop. Simply avoid to hide indices in the names of variables, but use vectors instead.
Hiding indices in names is a typical pitfall for beginners.

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