MATLAB: Sorting and rearranging data in multiple columns

Question

How to sort data as per ID and rearrange intensities in multiple columns?

ID Internsity >>>> ID1 ID2 ID3

 1   23       23  53  44
 2   53       78  45  56 
 3   44       28  12           
 2   45       26  94 
 1   78
 2   12
 3   56
 1   28
 2   94
 1   26

Thanks

Answer 1

One thing is you cannot store 3 columns in first row and 2 columns in others.

Here is a working example of what you want to do, not the most efficient one though;

 A = [ 1   23     
       2   53       
       3   44               
       2   45       
       1   78
       2   12
       3   56
       1   28
       2   94
       1   26 ]
  unq = unique(A(:,1)); % unique elements in 1st column
  for i = 1:length(unq)
    y{i} = A(A(:,1)==unq(i),2); % find the elements in the 2nd column 
                                % that has the same number in 1st column
  end

From here, to get the elements that has "unq(i)" in the first column, you do

y{i}