Re: [R] what happens when I store linear models in an array?

From: Andrew Robinson <A.Robinson_at_ms.unimelb.edu.au>
Date: Wed, 04 May 2011 23:02:57 +1000

Hi Andrew,

try

fitted(lms.ASP[1,1][[1]])

Cheers

Andrew

On Wed, May 04, 2011 at 01:49:45PM +0200, Andrew D. Steen wrote:
> I've got a bunch of similar datasets, all of which I've fit to linear
> models. I'd like to easily create arrays of a specific parameter from each
> linear model (e.g., all of the intercepts in one array). I figured I'd put
> the model objects into an array, and then (somehow) I could easily create
> corresponding arrays of intercepts or residuals or whatever, but I can't the
> parameters back out.
>
>
>
> Right now I've stored the model objects in a 2-D array:
> > lms.ASP <- array(list(), c(3,4))
>
>
>
> Then I fill the array element-by-element:
> > surf105.lm. ASP <- lm(ASP ~ time)
> > lms.ASP[1,1] <- list(surf105.lm.ASP)
>
>
>
> Something is successfully being stored in the array:
> > test <- lms.tx.ASP[1,1]
> > test
> [[1]]
> Call:
> lm(formula = ASP ~ time)
> Coefficients:
> (Intercept) elapsed.time..hr
> 0.430732 0.004073
>
>
>
> But I can't seem to call extraction functions on the linear models:
> > fitted(lms.ASP[1,1])
> NULL
>
>
>
> It seems like something less than the actual linear model object is being
> stored in the array, but I don't understand what's happening, or how to
> easily batch-extract parameters of linear models. Any advice?
>
>
>
>
>
> ____________________________________
>
> Andrew D. Steen, Ph.D.
>
> Center for Geomicrobiology, Aarhus University
>
> Ny Munkegade 114
> DK-8000 Aarhus C
> Denmark
> Tel: +45 8942 3241
> Fax: +45 8942 2722
>
> andrew.steen_at_biology.au.dk
>
>
>
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help_at_r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

-- 
Andrew Robinson  
Program Manager, ACERA 
Department of Mathematics and Statistics            Tel: +61-3-8344-6410
University of Melbourne, VIC 3010 Australia               (prefer email)
http://www.ms.unimelb.edu.au/~andrewpr              Fax: +61-3-8344-4599
http://www.acera.unimelb.edu.au/

Forest Analytics with R (Springer, 2011) 
http://www.ms.unimelb.edu.au/FAwR/
Introduction to Scientific Programming and Simulation using R (CRC, 2009): 
http://www.ms.unimelb.edu.au/spuRs/

______________________________________________
R-help_at_r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Received on Thu 05 May 2011 - 06:25:12 GMT

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.2.0, at Thu 05 May 2011 - 07:00:07 GMT.

Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-help. Please read the posting guide before posting to the list.

list of date sections of archive