Re: Lists
- To: mathgroup at smc.vnet.net
- Subject: [mg3999] Re: Lists
- From: rhall2 at umbc.edu (hall robert)
- Date: Tue, 14 May 1996 02:14:23 -0400
- Organization: University of Maryland, Baltimore County
- Sender: owner-wri-mathgroup at wolfram.com
In article <4ms4eq$3n0 at dragonfly.wolfram.com>,
Alex Bates <albates at ursula.uoregon.edu> wrote:
>
> I have a two dimensional list (i.e. {{1, 23}, {2, 24}, {3, 25},
>{4, 26}}), and I want to remove all the first values in each pair of
>numbers. For instance, for the first pair, I want it to read {23}, and
>for the second, {24} instead of {2, 24}.
> Any help would be greatly appreciated.
In[90]:=
Rest[#]& /@ {{1, 23}, {2, 24}, {3, 25}, {4, 26}}
Out[90]=
{{23}, {24}, {25}, {26}}
If you don't want the extra curly brackets, try
In[84]:=
#[[2]]& /@ {{1, 23}, {2, 24}, {3, 25}, {4, 26}}
Out[84]=
{23, 24, 25, 26}
You could also use Take[], Transpose[], Drop[], and Delete[].
There's probably more I haven't thought of.
--
Bob Hall | "Know thyself? Absurd direction!
rhall2 at gl.umbc.edu | Bubbles bear no introspection." -Khushhal Khan Khatak
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