Re: Q: Extract Elements from a List?

*To*: mathgroup at smc.vnet.net*Subject*: [mg28983] Re: [mg28968] Q: Extract Elements from a List?*From*: BobHanlon at aol.com*Date*: Thu, 24 May 2001 04:07:00 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

list={a,b,c,d,e,f,g,h,i,j}; start = 3; step = 2; Take[list, {start, Length[list], step}] Table[list[[k]], {k, start, Length[list], step}] Flatten[Partition[list, 1, step, {-start}, {}]] Extract[list, Table[{k}, {k, start, Length[list], step}]] list[[Table[k, {k, start, Length[list], step}]]] Bob Hanlon In a message dated 2001/5/23 2:58:14 AM, robert.schuerhuber at gmx.at writes: >probably a very easy question, but i couldn't find an answer in the >mathematica-book: > >i need to extract elements from a list, starting th element number x and >than taking every yth element, eg: > >with > >list={a,b,c,d,e,f,g,h,i,j} >start=3; >step=2: > >i'd like to get the list > >{c,e,g,i}. > >how can i do this in the easiest way? >