Sum in a loop
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Miguel L
el 13 de Sept. de 2016
Comentada: Miguel L
el 13 de Sept. de 2016
Please someone could help me how to do this in a loop; I am kind of begginer in Matlab:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/156335/image.jpeg)
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John BG
el 13 de Sept. de 2016
Hi Miguel
with no further information the following does what you ask for
U=randi([-10 10],1,10)
=
7.00 9.00 -8.00 9.00 3.00 -8.00 -5.00 1.00 10.00 10.00
Select a p such is smaller that at least length(U)-1, for instance
p=3
the limit for the sum is
L=length(U)-p
L =
7.00
and now let's calculate S
S=zeros(1,L);
for k=1:1:L
S(k)=sum(U([1:k+p]));
end
17.00 20.00 12.00 7.00 8.00 18.00 28.00
Since T does not show the vector arrow I understand it's a scalar, so to complete just multiply
S=T*S
If T is a vector, then you could either multiply element by element with
S=T.*S
provided T and S have same size
Miguel
if you find this answer useful would you please be so kind to mark my answer as Accepted Answer?
if you consider there is need for further clarification before you mark my answer as accepted do not hesitate to let me know what else would be required.
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please click on the thumbs-up vote link,
thanks in advance
John BG
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