How to rearrange a row vector into a pair wise column vector?

Hello, I have a row vector with a series of 21 values, for example from 1 to 21

v = [1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21]

and I need to rearrange it so it becomes a 20x2 vector like the one below, with the second value of the pair repeating in each new row.

I am sure there is a nice loop to do this, but I can't find a solution. Thank you

v2 = [1 2
    2 3
    3 4
    4 5
    5 6
    ...
    20 21]

Answer 1

[Stephen23]

"I am sure there is a nice loop to do this, but I can't find a solution."

This is MATLAB, so loops are not required:

v = 1:21

v = 1×21

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

m = [v(1:end-1);v(2:end)].'

m = 20×2

1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11

[marianne]

splendid, thank you!

Answer 2

[Sarvesh Kale]

Hi marianne,

See if the following code snippet can help you

v = [1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21];
v2= [] ;
for i=1:2
    v2(:,i) = v(1+i-1:20+i-1)';
end
disp(v2) 

I hope this helps you, please accept the answer if it does

Thank you