how to find the sum of 3 vectors of different sizes

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aman ch
aman ch on 26 Jun 2021
Edited: Jayant Gangwar on 28 Jun 2021
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
  1 Comment
dpb
dpb on 26 Jun 2021
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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Answers (1)

Jayant Gangwar
Jayant Gangwar on 28 Jun 2021
Edited: Jayant Gangwar on 28 Jun 2021
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.

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