Matrix multiplication. Trying to get scalar solution

1 view (last 30 days)
I am expecting a scalar value of 4/3 as the value for coor but am getting [2 0; 0 1]
Inputs as follows:
Number of floors: 2
Mass:2
Mass:1
numFlr=input('Number of floors: ');
nMode=[0.5 1]
nMode-nMode'
u0=ones(numFlr,1)
udot0=zeros(numFlr,1)
MVal=zeros(numFlr,1);
for i=1:numFlr
MVal(i)=input('Mass:');
end
M=diag(MVal);
% Choose=input('Mode: ');
% nMode=EigVec(:,Choose);
nModeT=nMode'
top=nMode.*M.*u0
bot=nMode.*M.*nModeT
coor=top/bot
The problem I am attemping is:

Accepted Answer

James Tursa
James Tursa on 10 May 2021
Those should be matrix multiples, not element-wise multiplies. Remove the dots. E.g.,
top=nMode * M * u0;
bot=nMode * M * nModeT;

More Answers (0)

Categories

Find more on Creating and Concatenating Matrices in Help Center and File Exchange

Tags

Community Treasure Hunt

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

Start Hunting!