DeleteCases
- To: mathgroup at smc.vnet.net
- Subject: [mg98144] DeleteCases
- From: Filippo Miatto <sottosupremo at gmail.com>
- Date: Tue, 31 Mar 2009 04:19:23 -0500 (EST)
Dear all,
Given this example list:
{{0, 0, 1, 1}, {0, 0, 2, 2}, {0, 0, 3, 3}, {1, 1, 0, 0}, {1, 1, 2, 2},
{1, 1, 3, 3}, {2, 2, 0, 0}, {2, 2, 1, 1}, {2, 2, 3, 3}, {3, 3, 0, 0},
{3, 3, 1, 1}, {3, 3, 2, 2}}
I need the elements {a,a,b,b} and {b,b,a,a} to be the same, i.e. i
want to delete one of the two occurrences from the list. (or all but
one if the condition is more complicated, say {a,b,c,d} and {b,a,c,d}
or {a,b,c,d} and {a,b,d,c})
How can i do that? Can i use DeleteCases? if so, what conditional
should I use to compare different elements in the list?
I tried without success for all the night.. (it's 6.15AM now!)
Thank you,
Filippo