split a n*m-by-1 vector into n m-by-1 vectors

I would like to split a m*n-by-1 vector into smaller ones, e.g. m-by-1. I have tried to think of an efficient way but i have not.

Any ideas?

Thank you.

Answer 1

[Star Strider]

I suggest reshape:

A=[1; 2; 3; 4; 5; 6; 7; 8];

B = reshape(A,2,4)

The columns of B are your 2x1 vectors:

B =

       1.0000e+000     3.0000e+000     5.0000e+000     7.0000e+000
       2.0000e+000     4.0000e+000     6.0000e+000     8.0000e+000

[jimaras]

Exactly what I wanted. Thank you!

[Star Strider]

My pleasure!

Answer 2

[Benjamin Avants]

I think the easiest method uses num2cell:

 myArray = ones(3,4,1);
myCell = num2cell(myArray,1)
ans = 
    [3x1 double]    [3x1 double]    [3x1 double]    [3x1 double]

You then have a 4 element cell array of 3x1 numerical arrays. Not sure if that's what you're looking for, but perhaps its a step in the right direction. The second parameter of num2cell determines which dimension is split into cells. Making that argument a 2 would yield a 3 element cell array of 4x1 numerical arrays.

[jimaras]

Basically, no. Maybe I didn't post the question correctly. I have the following vector:

A=[1; 2; 3; 4; 5; 6; 7; 8]

and I want to split it into 4 smaller ones (2x1) how can I do this.

P.s. Number are chosen randomly.

Answer 3

[Joseph Cheng]

How about putting it into the 3rd dimension? A=reshape(A,2,1,4) then you can reference A(:,:,1) to A(:,:,4) will be the smaller ones?