Displaying 2 results from an estimated 2 matches for "institutopesca".
2002 May 01
0
coefficient of determination on a nls regression
...Hello R-users,
How can I caculate the coefficient of determination (r-squared, r2) from a
nls regression model?
r2 = regression SS / total SS
The regression SS is given by deviance(model), isn't it? And what about
total SSQ?
Thanks,
Antonio Olinto
S?o Paulo Fisheries Institute
Brasil
www.institutopesca.sp.gov.br
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2001 Jun 01
1
nls works but not gnls
This works fine:
fit42<-nls(Vfs~SSlogis(Months,Asym.Int+Asym.Group*Groupdum,xmid,scal),
data=df,
start=c(Asym.Int=22,Asym.Group=5,xmid=2,scal=6),
na.action=na.omit)
But this, identical except using gnls, doesn't converge:
fit43<-gnls(Vfs~SSlogis(Months,Asym.Int+Asym.Group*Groupdum,xmid,scal),
data=df,
start=c(Asym.Int=22,Asym.Group=5,xmid=2,scal=6),
na.action=na.omit)
Error in gnls(Vfs