Parallelogram rule for vectors

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rui gao 2019-10-25

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https://ww2.mathworks.cn/matlabcentral/answers/487357-parallelogram-rule-for-vectors

评论： rui gao 2019-10-25

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Is there some methods to calculate the summation of these four red vectors showed below?

For example,

V1 = [4,3];
V2 = [-3,4];
V3 = [-2,-1];
V4 = [1,-5];

Any helps would be appreciated.

回答（1 个）

Fabio Freschi 2019-10-25

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Vtot = V1+V2+V3+V4

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Fabio Freschi 2019-10-25

V1+V2+V3+V4 (Sun of vectors) IS [4,4] What do you want to have?

rui gao 2019-10-25

I am sorry that I haven't explained it clearly. Maybe the link below can help me explain what I want.

https://en.wikipedia.org/wiki/Parallelogram_law

Now, I have a thought to programming in MATLAB, and I suppose I can get the wanted result. But I still need to try it later. For the path, I attached here as a picture. But I am still wondering whether there is some functions or package from MATLAB to solve my problems directly.