MATLAB: Double sum with upper limits

MATLABsum

I am trying to do the following calululation in matlab:

But I do not how how to do the two sums in the front. Our data (d) is a 67×120 array.

Any suggestions would be appreciated 🙂

Best Answer

s = (1:size(d, 1)).';
result = sum(sum(d .* cos(s))) / sum(cos(s));

Loops not needed, they're just a waste of time.

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function R = RotationMatrix(phi,theta,psi)
p = phi ;
t = theta ;
s = psi ;
D = [cos(p) sin(p) 0 ; -sin(p) cos(p) 0 ; 0 0 1] ;
C = [1 0 0 ; 0 cos(t) sin(t) ; 0 -sin(t) cos(t)] ;
B = [cos(s) sin(s) 0 ; -sin(s) cos(s) 0 ; 0 0 1] ;
R = B*C*D ; 
end

Best Answer

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MATLAB: Input euler angles which outputs rotation matrix R

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