Slices of 2d arrays?

[Dale Stanbrough <dstanbro@bigpond.net.au>]

I've always been under the impression that you could take a 
horizontal slice of a 2d array, but for the life of me I can't
find it in the LRM, or get it to work. Does anyone know
whether this exists, or is it just a figment of my overworked 
imagination?

I would like to be able to do...

   type grid is array (1..10, 1..10) of character;

   g : grid;
   ...

   put (g (1, 4..5));

Dale