how to find the sum of 3 vectors of different sizes

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aman ch 2021-6-26

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https://ww2.mathworks.cn/matlabcentral/answers/865810-how-to-find-the-sum-of-3-vectors-of-different-sizes

编辑： Jayant Gangwar 2021-6-28

function [Z]=My_func(a,b,c);

v1=[9 0 -7 5 3 8 -10 4 2];

a=sort(v1)

v2=[3 6 -2 4 1 0];

b=sort(v2)

v3=[4 1 4];

c=sort(v3)

Z=sum(v1,v2,v3)

end

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dpb 2021-6-26

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This is puzzling at best...you have three input arguments to the function but ignore those by defining local variables in their place -- whassup w/ that?

If the point is to sum() the three vectors, what's the point in sorting them first?

In fact, what is the point of writing a function here at all if the result wanted is just

v1=[9 0 -7 5 3 8 -10 4 2];
v2=[3 6 -2 4 1 0];
v3=[4 1 4];
Z=sum([v1,v2,v3]);

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Answer 1

Jayant Gangwar 2021-6-28

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https://ww2.mathworks.cn/matlabcentral/answers/865810-how-to-find-the-sum-of-3-vectors-of-different-sizes#answer_735145

编辑：Jayant Gangwar 2021-6-28

在 MATLAB Online 中打开

It is my understanding that you have created 3 sorted vectors and you want to find the sum of all the elements of the 3 vectors and you are facing problems in using the inbuilt 'sum' function. It is because you are passing 3 vectors as input whereas 'sum' only takes a single vector or matrix as input along with a few optional inputs. Changing line 7 such that only a single vector is passed to the 'sum' function will achieve the required result

Z = sum([v1,v2,v3]);

Please refer to sum documentation for more information on how to find sum of arrays.