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MathGroup Archive 1996

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Re: Lists

  • To: mathgroup at smc.vnet.net
  • Subject: [mg4013] Re: [mg3881] Lists
  • From: "Richard L. Bowman" <rbowman at bridgewater.edu>
  • Date: Mon, 20 May 1996 02:12:13 -0400
  • Sender: owner-wri-mathgroup at wolfram.com

On Tue, 14 May 1996, Alex Bates 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}. 

This is another way of doing what you want:

In[1]:= x = {{1, 23}, {2, 24}, {3, 25}, {4, 26}}

Out[1]= {{1, 23}, {2, 24}, {3, 25}, {4, 26}}

In[2]:=  Transpose[{Table[x[[i,2]],{i,1,4}]}]

Out[2]= {{23}, {24}, {25}, {26}}
-------------------------------------------------------------------------
Dr. Richard L. Bowman
Dept. of Physics                         e-mail:  rbowman at bridgewater.edu
Bridgewater College                                  phone:  540-828-5441
Bridgewater, VA  22812                                 FAX:  540-828-5479
  "http://www.bridgewater.edu/departments/physics/physics.html";
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