separating non empty array

i'm noob to matlab, I have a matrix of 1764 x1 this was concatenated from 2 images how can i create a new matrix where it will automatically split into 2 columns of 882 x2?

example

 b=[b;c] % this give me 1764 x 1
 i tried 
 c=[c,b] but it will only give me 882 x1 double instead of 882 x 2

any expert advise is greatly appreciated.

[per isakson]

You are using the letters a, b and c in a confusing way! Is a in the second line the same as a in the first?

[jaffa]

thanks for replying my answer. let me explain this in more details:

what i need help is to split the concatenation.example as follows:

 all_vect=[all_vect;feat_vect];
 % i'm concatenating 2 images into all_vect vertically which is 1764 x 1 double
what i'm trying to do now is to split this 1764 x 1 into 884 x 2 double

and i have tried this command which is not working:

 splitvect=[splitvect,all_vect];

please advise

Answer 1

[dpb]

a=[b c];

The ';' caused vertical concatenation; a ',' or space is horizontal. Read the "Getting Started" section on basic manipulations in Matlab...

http://www.mathworks.com/help/matlab/getting-started-with-matlab.html

There's a tutorial link on 'Matrices and Arrays' under which is another link specifically on 'Concatenation'. I urge you to just begin at the beginning and work thru the tutorial info to get a handle on the basics...it'll be much quicker route than posting and waiting...

[jaffa]

i understand the concatenation guide but what i need help is how to split the concatenation.

 all_vect=[all_vect;feat_vect];
 % i'm concatenating 2 images into all_vect vertically which is 1764 x 1 double

what i'm trying to do is to split this 1764 x 1 into 884 x 2 double i tried this command:

splitvect=[splitvect,all_vect];

please advise

Answer 2

[per isakson]

"what i'm trying to do now is to split this 1764 x 1 into 884 x 2 double"

This does it

    long_vector = linspace( 1, 12, 1764 ); % sample vector
    two_row_array = reshape( long_vector, [], 2 );

and check the result

    >> whos
      Name                 Size              Bytes  Class     Attributes
      long_vector          1x1764            14112  double              
      two_row_array      882x2               14112  double

The word "split"&nbsp is not a good one to describe this operation. And don't forget dpb's advise regarding Getting Started.

&nbsp

Correction

The name, two_row_array, should be two_col_array