From: François Morneau <francois.morneau_at_cirad.fr>

Date: Fri 19 Aug 2005 - 00:20:58 EST

etc…

>contrasts(Drain)<-contr.sum(4)

>mymodel<-nls(Dinc~r*(1+Drain)*D*log(Asym/D), data=treestab, start(r=0.05, Asym=40))

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Fri Aug 19 05:37:29 2005

Date: Fri 19 Aug 2005 - 00:20:58 EST

Hello,

> Dinc D Drain

[1,] 0.03 26.10 2[2,] 0.04 13.05 1[3,] 0.00 24.83 1[4,] 0.00 15.92 4[5,] 0.00 12.25 4[6,] 0.00 11.78 4[7,] 0.00 16.87 4

[8,] 0.00 15.12 4

[9,] -0.01 13.53 4

[10,] 0.04 16.55 3 [11,] 0.025 16.07 3 [12,] 0.00 30.24 3 [13,] 0.06 15.28 2

etc…

>contrasts(Drain)<-contr.sum(4)

>mymodel<-nls(Dinc~r*(1+Drain)*D*log(Asym/D), data=treestab, start(r=0.05, Asym=40))

Error in numericDeriv(form[[3]], names(ind), env) :

Missing value or an infinity produced when evaluating the model
In addition: Warning messages:

1: + not meaningful for factors in: Ops.factor(1, Drain)
2: + not meaningful for factors in: Ops.factor(1, Drain)

Do I need to use another function instead of nls to correctly include the factor ‘Drain’ ?

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Fri Aug 19 05:37:29 2005

*
This archive was generated by hypermail 2.1.8
: Fri 03 Mar 2006 - 03:39:54 EST
*