Re: List manipulation question - 2013

*To*: mathgroup at smc.vnet.net*Subject*: [mg129620] Re: List manipulation question - 2013*From*: christopher arthur <chris.arthur1 at gmail.com>*Date*: Wed, 30 Jan 2013 22:04:52 -0500 (EST)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*Delivered-to*: l-mathgroup@wolfram.com*Delivered-to*: mathgroup-newout@smc.vnet.net*Delivered-to*: mathgroup-newsend@smc.vnet.net*References*: <20130130092653.09BA46877@smc.vnet.net>*Reply-to*: chris.arthur1 at gmail.com

Lea, You might try something like Map[Position[list1,#]&,list2] this will give you a list of how the two lists coincide. It means, for each element in list2, find its position in list1, and give me a list of the positions. Chris Lea Rebanks a écrit : > Dear All, > > I have the follow problem with the combination of a few lists. > I shall outline the problem or what I am trying to do. > I know that to solve this problem requires a number of processes, but I am > not sure how to setup the coding to achieve my desired result. > Please could someone show me the coding for this problem. > > The problem:- > 1 - I have a list1 created from 24+(15*n1) All n1 are integers > 1,2,3,4.....to a large number of integers. > 2 - I want to divide the list1 by 24 and create another list2 with only the > integer results in list2. > Table[24 + 15*i, {i, 100}]/24 ... so that integer results in list2 > = { 144, 264, 384, 504, 624, 744, 864, 984, 1104 } > 3 - I have another list3 created from 12+(3*n2) All n2 are integers > 1,2,3,4.....to a large number of integers. > 4 - With list3 I want to find :- > (i) The integer number of n2 that either equates 12+(3*n2) = 144 or > the next FIRST available number in list2 that meets this equality. > then also (ii)The integer number(s) of n2 that equates 12+(3*n2) = 24+(15*n1) after the first equal value for say 6 repetitions. > then also (iii)The integer number(s) of n1 that equates 12+(3*n2) = > 24+(15*n1) after the first equal value for say 6 repetitions. > > The above example is quite simple, but I am hoping to setup the coding to > work with other integer values instead of 3 & 15 which will present more of > a challenge. > > Any help or advice greatly appreciated. > Best regards, > Lea... > > > >

**References**:**List manipulation question - 2013***From:*Lea Rebanks <lrebanks@gmail.com>