필터 지우기
필터 지우기

F=Kff*uf - Matrix operation

조회 수: 5 (최근 30일)
BioZ
BioZ 2021년 5월 11일
댓글: Rik 2021년 5월 11일
Greetings everyone, I am trying to do some simple matrix operation in Matlab.
I have equation: Ff=Kff*Uf where Ff is 3x1 matrix, Kff is 3x3 matrix and Uf is 3x1 matrix. As in the following picture.
How can I solve this to find U1,U2,U3 in matlab?
When I attempt solving this with matlab I get number of errors such as: (Error using / ).
Any help would be much appreciated. Thank you.
clc
clear
F = [383.02;
321.39;
0;];
Kff = [634.8 -191.2 -353.6;
-191.2 447.3 353.6;
-353.6 353.6 683;];
%%Uf = F./Kff

채택된 답변

Rik
Rik 2021년 5월 11일
You were almost there:
F = [383.02;
321.39;
0;];
Kff = [634.8 -191.2 -353.6;
-191.2 447.3 353.6;
-353.6 353.6 683;];
Uf=Kff\F
Uf = 3×1
0.8703 1.2431 -0.1930
fprintf('%.5f\n',F-Kff*Uf)%check if they are indeed equal (within a rouding error)
0.00000 0.00000 -0.00000

추가 답변 (1개)

EmirBeg
EmirBeg 2021년 5월 11일
Maybe like this?
F = [383.02;
321.39;
0;];
Kff = 10^2* [634.8 -191.2 -353.6;
-191.2 447.3 353.6;
-353.6 353.6 683];
Uf = F'/Kff; % You used a dot but u need to use ' to transpose
  댓글 수: 1
Rik
Rik 2021년 5월 11일
Almost. You would have to transpose the result again to make sure Uf is a column vector.
F = [383.02;321.39;0];
Kff = 10^2* [634.8 -191.2 -353.6;-191.2 447.3 353.6;-353.6 353.6 683];
Uf = (F.'/Kff).'
Uf = 3×1
0.0087 0.0124 -0.0019
fprintf('%.5f\n',F-Kff*Uf)%check if they are indeed equal (within a rouding error)
0.00000 -0.00000 0.00000

댓글을 달려면 로그인하십시오.

카테고리

Help CenterFile Exchange에서 Loops and Conditional Statements에 대해 자세히 알아보기

제품

Community Treasure Hunt

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

Start Hunting!

Translated by