Re: List Manipulation
- To: mathgroup@smc.vnet.net
- Subject: [mg10553] Re: List Manipulation
- From: dreissNOSPAM@nospam.earthlink.net (David Reiss)
- Date: Tue, 20 Jan 1998 16:53:57 -0500
- Organization: EarthLink Network, Inc.
- References: <69nbfq$89h@smc.vnet.net>
In article <69nbfq$89h@smc.vnet.net>, Paul.Hanson@colorado.edu wrote:
> Hola!
> Hope you're all doing well. If I have a list of n lists, and want to
> get rid of all the even ones how would I go about doing this? That
> is, {{n1},{n2},.....{2n}} converted to {{n1},{n3}...{2n-1}}. I tried
> using the various procedures in Wolfram's book, but nothing seems to
> work (ie, Delete, Take, etc.). Thanks for the help.
>
> Paul Hanson
>
> --
> * *
> * *
> /\ */\*
> / \ / \ /\
Here is an example of a solution built up in stages
In[1]:=
temp={{n1},{n2},{n3},{n4}}
Out[1]=
{{n1},{n2},{n3},{n4}}
In[2]:=
Partition[temp,2]
Out[2]=
{{{n1},{n2}},{{n3},{n4}}}
In[3]:=
Transpose[Partition[temp,2]]
Out[3]=
{{{n1},{n3}},{{n2},{n4}}}
In[4]:=
Transpose[Partition[temp,2]][[1]]
Out[4]=
{{n1},{n3}}
--
David Reiss
dreissNOSPAM@nospam.earthlink.net
http://home.earthlink.net/~dreiss
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