Displaying 1 result from an estimated 1 matches for "fit43".
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fit3
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 ~ SSlogis(Months, Asym.Int + Asym.Group * Groupdum, :
Step halving factor reduced below minimum in NLS step
I tried adding
,...