how can convert vector to array

how can convert vector to array ; Ex:

a = [ 1 2 3 ];

i like to convert it to :

d = [ 1 0 0;
      0 2 0;
      0 0 3;
      1 2 0;
      1 0 3;
      0 2 3;
      1 2 3 ];

thanks

[Walter Roberson]

How important is that order? Some of the other orders of the same kind of setup are much easier.

[Walter Roberson]

http://www.mathworks.co.uk/matlabcentral/answers/43073-a-guide-to-tags

[Walter Roberson]

In a duplicate question, the poster asked

Ex:

w = [ 1 2  3 4 5 6 7 8 9 10 11 12 13 14 15 ]

I like to convert it to

g= [1 0 0 0 0 0 0 0 0 0 0 0 0 0 0;
0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 ;
0 0 3 0 0 0 0 0 0 0 0 0 0 0 0;
0 0 0 4 0 0 0 0 0 0 0 0 0 0 0 ;
......until......... ; 
0 0 3 4 5 6 7 8 9 10 11 12 13 14 15;
0 2 3 4 5 6 7 8 9 10 11 12 13 14 15;
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15]

that mean I have , rows=2^(2n-1) I got answer from _ the cyclist_ http://www.mathworks.com/matlabcentral/answers/235359-how-can-convert-vector-to- array . it was good answer, but it was active until 5 elements [ 1 2 3 4 5 ]. thank you - the cyclist _

Answer 1

[the cyclist]

If the exact ordering is not important, then you could do

P = perms([1 2 3 0 0])
Q = unique(sort(P(:,1:3),2),'rows')