Re: pattern matching and droping elements from list of lists.

*To*: mathgroup at smc.vnet.net*Subject*: [mg49759] Re: [mg49742] pattern matching and droping elements from list of lists.*From*: Ken Levasseur <klevasseur at mac.com>*Date*: Fri, 30 Jul 2004 06:02:11 -0400 (EDT)*References*: <200407291146.HAA10396@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Sean: Try this: Outer[List, {a,b,c}, {a,b,c}, {a,b,c}]]]// Flatten[#, 2] &// Select[#, Not[SameQ @@ #]& ] & {{a, a, b}, {a, a, c}, {a, b, a}, {a, b, b}, {a, b, c}, {a, c, a}, {a, c, b}, {a, c, c}, {b, a, a}, {b, a, b}, {b, a, c}, {b, b, a}, {b, b, c}, {b, c, a}, {b, c, b}, {b, c, c}, {c, a, a}, {c, a, b}, {c, a, c}, {c, b, a}, {c, b, b}, {c, b, c}, {c, c, a}, {c, c, b}} Ken Levasseur Math. Sci. UMass Lowell On Jul 29, 2004, at 7:46 AM, sean kim wrote: > hello group, > > Outer[List, {a, b, c}, {a, b, c}, {a, b, c}] > > will output > > {{ > {{a, a, a}, {a, a, b}, {a, a, c}}, {{a, b, a}, {a, b, b}, {a, b, c}}, > {{a, c, a}, {a, c, b}, {a, c, c}}}, > {{{b, a, a}, {b, a, b}, {b, a, c}}, {{b, b, a}, {b, b, b}, {b, b, c}}, > {{b, c, a}, {b, c, b}, {b, c, c}}}, > {{{c, a, a}, {c, a, b}, {c, a, c}}, {{c, b, a}, {c, b, b}, {c, b, c}}, > {{c, c, a}, {c, c, b}, {c, c, c}} > }} > > how do I remove {a,a,a} and {b,b,b} and {c,c,c} from above? > > thanks all in advance for any insights > > sean >

**References**:**pattern matching and droping elements from list of lists.***From:*sean_incali@yahoo.com (sean kim)