Re: extracting a list to a list, help please
- To: mathgroup at smc.vnet.net
- Subject: [mg46177] Re: [mg46155] extracting a list to a list, help please
- From: "Mihajlo Vanevic" <mvanevic at gawab.com>
- Date: Tue, 10 Feb 2004 00:05:44 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
In[1]:=
mylist1 = {{a1, b1, c1, d1}, {a2, b2, c2, d2}, {a3, b3, c3, d3}}
Out[1]=
{{a1, b1, c1, d1}, {a2, b2, c2, d2}, {a3, b3, c3, d3}}
In[2]:=
mylist1[[All, {1, 2}]]
Out[2]=
{{a1, b1}, {a2, b2}, {a3, b3}}
Regards,
Mihajlo Vanevic
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* At 2004-02-09, 05:54:00
* Serge, nospam at nospam.com wrote:
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>Hello,
>
>I am a beginner in Mathematica and I have a rather simple question. I
>made some calculations that I need for an orbit and I have a list that
>look like this:
>
>mylist1 = {{a1,b1,c1,d1},{a2,b2,c2,d2},{a3,b3,c3,d3},etc}
>
>All I want to do is to make a list of the form
>
>mylist2 = {{a1,b1},{a2,b2},{a3,b3},etc}
>
>from the original list (mylist1),
>
>so that I can ListPlot those pairs of points (they represent x and y
>coordinates for some orbit). I am having trouble figuring out how to do
>this. I tried using the Table command but I couldn't get it into the
>above form. I would greatly appreciate if someone can help me out.
>Thanks so much.
>
>Best,
>Serge
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