How to seperate an array into two?

Im trying to seperate an array into two even variables using for loops. How can i do that?

I know that i can just do V1=V(1:2:end); V2=V(2:2:end); but I want to do it using for loops.

V=(8x1)
[r,c]=size(V)
V1=V(1);
V2=V(2)
for i=1:r-1
        for j=1:(r/2)
        V1(j)=V(i+2)
        V2(j)=V(i+1)
end

[dpb]

No loops needed...

V1=V(1:2:end);
V2=V(2:2:end);

I'd also strongly suspect there's really no reason to create two variables with sequential names; just reference the desired subset directly from the original.

[Jose Grimaldo]

I know i can do that but I want to do it using for loops

Answer 1

[dpb]

Not a good idea still unless is homework...there are any number of ways to do so; about as simple as any would be

for i=2:2:numel(V)
  j=i/2;
  v1(j)=V(i-1);
  v2(j)=V(i);
end

preallocate, of course.

As "exercise for Student", with minor alterations the above will work silently if the length of the input vector is odd as well. HINT: start w/

for i=1:2:numel(V)
  j=???  
  ...

instead and work form there...

Both, of course, presume the input vector is alternating odd-even rather than looking at what the values in the vector are and selecting by it.

Answer 2

[Mohammad Sami]

You can directly index into your 1-D vector.

V = rand(8,1);
n = length(V);
Vodd = V(1:2:n);
Veven = V(2:2:n);