Displaying 1 result from an estimated 1 matches for "ssllogis".
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sslogis
2007 Oct 17
2
nmle: gnls freezes on difficult case
...03
svn rev 43063
language R
version.string R version 2.6.0 (2007-10-03)
start=c(-1.5, 9.5, 0.09, 10.25)
names(start)<-c("A","B","xmid","scal")
gnls(response~SSllogis(conc,A,B,xmid,scal),tdat,start=start,weights=varPower(),verbose=TRUE)
**Iteration 1
GLS step: Objective: NULLvarStruct parameters:
power
0.3373199
NLS step: RSS = 0
model parameters:-0.799941 8.99983 -0.522623 212.314
iterations: 2
Convergence:
params varStruct
1.172208 1....