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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```

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