Re: Deleting duplicates from a list

*To*: mathgroup at smc.vnet.net*Subject*: [mg76000] Re: [mg75940] Deleting duplicates from a list*From*: Adriano Pascoletti <adriano.pascoletti at dimi.uniud.it>*Date*: Mon, 14 May 2007 05:48:32 -0400 (EDT)*References*: <200705140725.DAA22641@smc.vnet.net>

This is the unsorted union problem, which can be efficiently solved using Sow and Reap (see Help Browser > Reap > Further Examples) In[8]:=UnsortedUnion[x_] := Reap[Sow[1, x], _, #1 & ][[2]] In[9]:=UnsortedUnion[{8, 8, 11, 11, 19}] Out[9]={8, 11, 19} Adriano Pascoletti On 14 mag 2007, at 09:25, Raul Martinez wrote: > Hi all, > > I have a list, e.g., {8, 8, 11, 11, 19}. I want to eliminate all > duplicates so the list becomes {8, 11, 19}. Can anyone suggest a > command that will do this? > > TIA, > > Raul Martinez >

**Follow-Ups**:**Re: Re: Deleting duplicates from a list***From:*Murray Eisenberg <murray@math.umass.edu>

**References**:**Deleting duplicates from a list***From:*Raul Martinez <raulmart@mac.com>