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MathGroup Archive 2006

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Re: Creating a new table using values from a column in another table,

  • To: mathgroup at smc.vnet.net
  • Subject: [mg66385] Re: [mg66346] Creating a new table using values from a column in another table,
  • From: Bob Hanlon <hanlonr at cox.net>
  • Date: Thu, 11 May 2006 02:15:28 -0400 (EDT)
  • Reply-to: hanlonr at cox.net
  • Sender: owner-wri-mathgroup at wolfram.com

data={{x1,y1},{x2,y2},{x3,y3}};

{#[[1]],f[#[[1]]]}&/@data

{#,f[#]}&/@data[[All,1]]

{#,f[#]}&/@First/@data

data/.{x_,_}:>{x,f[x]}


Bob Hanlon

---- Wonko the Sane <noone at nowhere.com> wrote: 
> Hi all,
> 
> I have a question that I have not been able to work out myself, and so 
> put it to the group to help. I have a set of data points in a table (2 
> columns {{x1,y1},{x2,y2},....,{xn,yn}}) I have performed a fit to the 
> data and have a function f[x] which I would now like to evaluate at each 
> data point (column 1 of the first table) to get a new table 
> {{x1,f[x1]},{x2,f[x2]},....,{xn,f[xn]}}. Is there a way to do this? I 
> hope my request is clear
> 
> Best Regards
> Michael
> 


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