How to merge two D arrays according a given order?

Hi all, I want to merge two D arrays according a given order.

Suppose I have two arrays id1=[ 3 5 6] and id2=[1 4 7] and coordinates of these ids id1_coords=[23 45;34 66;34 24] and [26 34;46 78; 34 67]

Now, if I sort and merge id1 and id2 as merge_id= union(id1,id2); merge_id=[1 3 4 5 6 7]; So how could i merge id1_coords and id2_coords such that they are arranged in the same sequence as it is in merge_id i.e.

merge_coords will be like..[26 34; 23 45;46 78.....] soon.

[Aditya Shukla]

Hi, Suppose if i get the array like this

m=
  1 14 56   
  2 12 45
  2 34 65
  3 78 56
  4 64 34
  4 45 23
  .......
but i want to delete rows having same ids{but different coordinates}, 
here-'2',and -'4' . i.e want to retain any one of the rows '2' and '4'.

somewhat like this..

 m=
    1 14 56   
    2 12 45
    3 78 56
    4 64 34
    .......
It could be any id, [not only 2 and 4].

Answer 1

[Mischa Kim]

Aditya, how about

 ID1 = [id1' id1_coords];
 ID2 = [id2' id2_coords];

 ID  = sortrows([ID1; ID2])
 ID =
     1    26    34
     3    23    45
     4    46    78
     5    34    66
     6    34    24
     7    34    67

[Aditya Shukla]

Thanks Kim for such an easy solution