Re: Using "Fit"
- To: mathgroup at smc.vnet.net
- Subject: [mg16157] Re: [mg16128] Using "Fit"
- From: "Tomas Garza" <tgarza at mail.internet.com.mx>
- Date: Tue, 2 Mar 1999 01:13:09 -0500
- Sender: owner-wri-mathgroup at wolfram.com
Philip M. Howe wrote:
> I'm trying to analyze some datasets in a moderately efficient way, and am
> having trouble. Your suggestions will be appreciated.
>
> Suppose that I have a dataset, and I want to fit a function through a
> number of points, where I vary that number systematically, by taking just
> two {x,y} points, then three points, then four, etc. So, if "data" is my
> dataset, I can form new datasets by doing
>
> Take[data,2], Take[data,3], etc. I can then do a fit to each dataset.
>
> Fit[Take[data,2], {1,x},x];
> Fit[Take[data,3], {1,x},x];
> Fit[Take[data,4], {1,x},x]; etc.
>
> But this is slow for large datasets. I can form a table of datasets.
>
> Table[Take[data,n],{n,2,100}];
>
> Now I'd like to apply Fit to each of the lists in the table, and I can't
> figure out the syntax. Or, perhaps there is a better approach.
Philip,
Try
Table[Fit[Take[data,n],{1,x},x],{n,2,100}];
or
Fit[Take[data,#],{1,x},x]&/@Range[2,100];
Good luck,
Tomas Garza
Mexico City