Re: Combining Lists
- To: mathgroup at smc.vnet.net
- Subject: [mg16782] Re: Combining Lists
- From: "Stephen P Luttrell" <luttrell at signal.dra.hmg.gb>
- Date: Wed, 24 Mar 1999 17:07:10 -0500
- Organization: Defence Evaluation and Research Agency
- References: <7d9rot$7pe@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
JOHN C ERB wrote in message <7d9rot$7pe at smc.vnet.net>...
>I have a set of x & y data points in one list;
>
>xydata={{x1,y1},{x2,y2},{x3,y3},{x4,y4}};
>
>and a corresponding set of z data points in another list:
>
>zdata={z1,z2,z3,z4};
>
>I wish to combine them into one list of {x,y,z} data points,
>which I can do by:
>
>{temp1,temp2}=Transpose[xydata];
>xyzdata=Transpose[{temp1,temp2,zdata}]
>
>which gives the desired result:
>
>{{x1,y1,z1},{x2,y2,z2},{x3,y3,z3},{x4,y4,z4}}
>
>QUESTION: Is there a more efficient way of doing this?
This is a slicker way of doing what you want:
xydata={{x1,y1},{x2,y2},{x3,y3},{x4,y4}};
zdata={z1,z2,z3,z4};
MapThread[Append[#1,#2]&,{xydata,zdata}]
Stephen P Luttrell
Signal Processing and Imagery Department
DERA Malvern, St.Andrew's Road
Malvern, United Kingdom, WR14 3PS
+44 (0)1684 894046 (tel)
+44 (0)1684 894384 (fax)
luttrell at signal.dera.gov.uk (email)