Re: Data Extraction from List {{x1,y1}..{xn,yn}}where ##<x<##
- To: mathgroup@smc.vnet.net
- Subject: [mg11756] Re: Data Extraction from List {{x1,y1}..{xn,yn}}where ##<x<##
- From: SChandler <SChandler@uh.edu>
- Date: Thu, 26 Mar 1998 03:09:25 -0500
- Organization: University of Houston
- References: <6f1p6l$ffn@smc.vnet.net>
If I understand your problem correctly, I believe the following would
work. I've illustrated the method using a table of 20 random pairs and
set x1=0.4 and x2=0.6.
Select[Table[{Random[Real,{0,1}],Random[Real,{0,1}]},{20}],(0.4<#[[1]]<0.6)&]
Seth J. Chandler
Associate Professor of Law
University of Houston Law Center
charles wrote:
> Hello,
>
> How might I extract a range of {x,y}from a list of data, so that I can
> perform a linear fit between the point that meet the criterion of being
> bewteen x_n and x_m.
>
> In other words, fit a line to a part of the data that has #1<x<#2.
>
> I have attempted to use the Select function but it requires me to
> Flatten the data list first? And it results in giving me a list of just
> the x values not the {x,y} pairs.
>
> Any help is greatly appreciated.
>
> Thanks,
>
> Charles Koehler