predict()

[Gregoire, Timothy]

I like using gls() to fit regressions b/c it permits use of varFuncs to model heteroscedasticity.

 

To my dismay, however, I just found out that the predict function used in conjunction with a model object from gls() will not produce se.fit values nor will it generate intervals.

 

Is there a ready made alternative function, or will I have to write my own to do the job?

 

Tim

 

Timothy G. Gregoire

J. P. Weyerhaeuser Professor of Forest Management

School of Forestry & Environmental Studies, Yale University

360 Prospect Street, New Haven, CT  06511-2104  U.S.A.

 

office: 1.203.432.9398  mobile: 1.203.508.4014, fax: 1.203.432.3809

timothy....@yale.edu

G&V sampling text: http://crcpress.com/product/isbn/9781584883708

 

[Andrew Robinson]

Hi Tim,

I poked around a few of the packages that I like to use and didn't see
anything useulf --- e.g. the excellent estimable fucntion from gmodels
doesn't work --- I think that you'll have to roll your own.

Best wishes

Andrew

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Andrew Robinson
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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/