[R] nlme varFixed

Michael Dewey ||@t@ @end|ng |rom dewey@myzen@co@uk
Sat Mar 4 14:26:13 CET 2023

Dear Franz

Only attachments of specific types are allowed on the R lists and yours 
did not come through. It might be necessary to show your code as well.

Have you thought of trying the mailing list dedicated to mixed models?



On 04/03/2023 09:16, Franz Härtl wrote:
> Dear R-project team,
> I have a problem with the function varFixed() of the nlme-package.
> I used it with the squid-data of Zuur et. al 2009 (chapter 4), to fix 
> increasing residuals (heterogenetiy) (see graph in the email)
> I get the message '
> Variance function structure of class varFixed with no parameters, or 
> uninitialized
> Could you help me please?
> Kind regards
> Franz
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