How do I sum multiple vectors inside an array?
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I am trying to sum vectors for specific columns of an array using cell arrays but it is summing all the components of each vector and is returning one value which is the problem. I want it to sum as vectors should with x components and y components and return a vector.
I am trying to iterate this in a loop for each column so if there is also a way without indexing by just using a loop, feel free to let me know. Thanks in advance!
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Jan
2019 年 5 月 9 日
編集済み: Jan
2019 年 5 月 9 日
You can use the force between two bodies twice:
f = zeros(n, n, 3);
for i = 1:n
for x = i+1:n
f_ix = G * (p(x,:) - p(i,:)) * ...
((mass(i) * mass(x)) / (norm(p(x,:) - p(i,:))^3))
f(i,x,:) = f_ix;
f(x,i,:) = -f_ix;
end
end
% Calculate the total acceleration *after* getting all forces:
a = sum(f, 3) ./ mass; % With auto-expanding since R2016b
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