RE: Q: Extract Elements from a List?
- To: mathgroup at smc.vnet.net
- Subject: [mg28975] RE: [mg28968] Q: Extract Elements from a List?
- From: Mikael Adlers <mikael at mathcore.com>
- Date: Thu, 24 May 2001 04:06:52 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
Hi,
just use the function Take. Info from the help:
Take[list, {m, n, s}] gives elements m through n in steps of s.
Thus something like this should do it,
list={a,b,c,d,e,f,g,h,i,j}
start=3;
step=2;
Take[list, {start, Length[list], step}]
Regards,
/Mikael Adlers
------------------------------------------------------------------
Mikael Adlers, Ph.D. email: mikael at mathcore.com
MathCore AB phone: +4613 32 85 07
Wallenbergsgata 4 fax: 21 27 01
SE-583 35 Linkoping, Sweden
> -----Original Message-----
> From: Robert Schuerhuber [mailto:robert.schuerhuber at gmx.at]
To: mathgroup at smc.vnet.net
> Sent: den 23 maj 2001 07:55
> To: mathgroup at smc.vnet.net
> Subject: [mg28975] [mg28968] Q: Extract Elements from a List?
>
>
> hi!
>
> 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?
>
> regards, robert
>
>