matlab removing redundant objects from a list of objects (arrays)

matlab removing redundant objects from a list of objects (arrays)

In matlab or scilab, how can someone remove redundant entries in a list of
array objects ? and perhaps save it as a matrix ?
example: p = list(); p(1) = ['a' 'b' 'c']; p(2) = ['a' 'b' 'c']; p(3) =
['b' 'a' 'c']