how to delete repeated coordinates

if i have d=[ 3 4; 4 3;7 6 ;6 7]

so i want this result d=[ 3 4; 7 6]

Answer 1

[dpb]

Presuming values are significant but order isn't, simplest that comes to mind is

>> unique(sort(d,2),'rows')
ans =
   3     4
   6     7
>>