Info

此问题已关闭。请重新打开它进行编辑或回答。

I need assistance in writing a matlab code for this iterative example

1 次查看（过去 30 天）

显示更早的评论

George Adomako Kumi 2021-11-26

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1596889-i-need-assistance-in-writing-a-matlab-code-for-this-iterative-example

关闭： John D'Errico 2021-11-26

TRYING TO SOLVE FOR u and finding maximum iterations needed to solve

Q1 = [ 25, 10, 15, 20; 10, 12, 18, 23; 12, 15, 17,19 ];

F1 = [ 6;7;12];

F2 = [ 48;64;72];

iter = 0;

N = 100; % maximum number of iterations

uold = u0;

QA = Q1;

F1 = RF1;

F2 = RFM; % max load capacity

u0 = u1;

dF = 0.2;

[row,col] = size(u);

tol = 0.0001;

syms 'u'

R1 = F2 - F1;

u2 = inv(Q1)*R1;

u3 = u0 + u2;

F3 = F1 + dF;

R2 = F2 - F3; % unbalanced force must be equal to 0 in order to converge

Q2 = F3\u3;

u4 = inv(Q2)*R2;

u5 = u3 + u4;

F4 = F3 + dF;

R3 = F2 - F4;

Q3 = F4\u5;

u6 = inv(Q3)*R3;

u7 = u5 + u6;

F5 = F4 + dF;

R4 = F2 - F5;

Q4 = F5\u7;

u8 = inv(Q4)*R4;

u9 = u7 + u8;

F6 = F5 + dF;

R5 = F3 - F6;

2 个评论
显示无隐藏无

John D'Errico 2021-11-26

在 MATLAB Online 中打开

You do understand that the inverse of a matrix is undefined when the matrix is not square?

Q1 = [ 25, 10, 15, 20; 10, 12, 18, 23; 12, 15, 17,19 ]
Q1 = 3×4
    25    10    15    20
    10    12    18    23
    12    15    17    19
size(Q1)
ans = 1×2
     3     4

Therefore no number of iterations will suffice, sicne your code will error out almost immediately.

George Adomako Kumi 2021-11-26

thanks

请先登录，再回答此问题。

回答（0 个）

请先登录，再回答此问题。

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by