[Date Index] [Thread Index] [Author Index]

Filtering a list of list for certain elements that are neighbours

• To: mathgroup at smc.vnet.net
• Subject: [mg88834] Filtering a list of list for certain elements that are neighbours
• From: Steven Siew <stevensiew2 at gmail.com>
• Date: Sun, 18 May 2008 07:34:18 -0400 (EDT)

I have a list of lists

mylist={{a,b,c},{a,c,b},{b,a,c},{b,c,a},{c,a,b},{c,b,a}}

I want to filter out all lists that have "a being a neighbor to b".

I am looking for the following result.

{{a,c,b},{b,c,a}}


For this toy example, I can probably do it by hand but my real problem
has 120 lists in a list. And I need to filter out various combination
of letters like "s cannot be next to d" , "s cannot be next to j" , "c
cannot be next to j" , "h cannot be next to d" and "h cannot be next
to s".

• Follow-Ups:
  • Re: Filtering a list of list for certain elements that
    • From: Carl Woll <carlw@wolfram.com>
  • Re: Filtering a list of list for certain elements that are neighbours
    • From: Curtis Osterhoudt <cfo@lanl.gov>
  • Re: Filtering a list of list for certain elements that are neighbours
    • From: "W_Craig Carter" <ccarter@mit.edu>
  • Re: Filtering a list of list for certain elements that are neighbours
    • From: Curtis Osterhoudt <cfo@lanl.gov>