Multiply 3x3 and 3x1 vectors in a loop

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sharonb 2022-11-16

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https://ww2.mathworks.cn/matlabcentral/answers/1852943-multiply-3x3-and-3x1-vectors-in-a-loop

评论： Matt J 2022-11-16

I am trying to multiply a 3x3 vector (matrix) with a 3x1 vector in a loop. The 3x1 vectors are stored variables and I would like the loop this until all 3x1 vectors are loaded. I am fairly new and this is what I have so far (editted to by generic):

% Define 3x3
V1= [1 0 0; 0 1 0 ; 0 0 1]
% load 3x1 vectors from mat file and create a loop
for k = 1:3
    load(['vectors.mat'])
    V2Array=vv(k, :)
end
% Multiply 3x3 and 3x1 vectors
calc = V1*V2
Results = sprintf(  '%s%d', 'Results')

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sharonb 2022-11-16

移动：Stephen23 2022-11-16

vectors.png

the mat file contains row vectors (3) and is outputted as vv. I changed the name to vectors.mat. In additional, I thought I need to convert these to an array if I want to multiply it with the 3x3 matrix