Re: Fit data with range
- To: mathgroup at smc.vnet.net
- Subject: [mg88435] Re: Fit data with range
- From: Szabolcs Horvát <szhorvat at gmail.com>
- Date: Mon, 5 May 2008 06:14:16 -0400 (EDT)
- Organization: University of Bergen
- References: <fvhdv7$3q6$1@smc.vnet.net>
Ivan wrote:
> Hi
>
> I want to fit a polynomial function to a set of data,
> only between say xmin to xmax. How can I do that?
> I know only how to fit the whole range.
>
> For example:
>
> data = ReadList["file.dat",{Number,Number}];
>
> fit = Fit[data,{1,x,x^2},x]
>
> Plot[fit,{x,0,10}]
>
Filter the data with Select or Case! The exact command to use depends
on the shape of the data. E.g. Case[data, {x_, _} /; xmin <= x <= xmax]