Sum per 2 elements in vector

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Ann-Lara Aernoudts
Ann-Lara Aernoudts el 25 de En. de 2021
Respondida: Abdel el 18 de Sept. de 2023
Hello,
I am trying to sum my vector by 2 elements.
An example:
I have:
A= [1;2;3;4;5;6]
What I want:
A_new = [3;7;11]
Is there any way to easily code this?
I know one way via a for-loop but I was wondering if there was a more efficient way.
Thanks in advance!

Respuesta aceptada

Stephen23
Stephen23 el 25 de En. de 2021
Editada: Stephen23 el 25 de En. de 2021
A = [1;2;3;4;5;6];
B = A(1:2:end) + A(2:2:end)
B = 3×1
3 7 11
or more generally:
B = sum(reshape(A,2,[]),1).'
B = 3×1
3 7 11
or
B = reshape(A,2,[]).' * ones(2,1)
B = 3×1
3 7 11
or
B = cellfun(@sum,mat2cell(A,2*ones(1,3),1))
B = 3×1
3 7 11
  1 comentario
Ann-Lara Aernoudts
Ann-Lara Aernoudts el 25 de En. de 2021
Perfect, that works!
I'll use the more general code.
Thank you!

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Más respuestas (1)

Abdel
Abdel el 18 de Sept. de 2023
The sum of the last two elements in (call the result ans6)

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