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I am operating on Windows 98, with S+
professional
I am attempting to do a simple nonlinear fit with my own
model:
power.model <- function(mean, c, z){
c * mean ^z
}
fm1 <- nlsList( (vars) ~ power.model(means, c, z)|spp,
data =
"" start = list(c=1, z=1) )
the above data contain 18 records (reps = 18) per
group.
I received the following message -
........
Warning messages:
Warning in power.model(means, c, z): (1258.54)^(111.6) OVERFLOW
error
Error in nls(formula = formula, data = "" start = start,
con..: step factor reduced below minimum
Many thanks in advance,
Henry
Dr. M. Henry H. Stevens
Postdoctoral
Associate
Department of Ecology, Evolution, & Natural Resources
14
College Farm Road
Cook College, Rutgers University
New Brunswick, NJ
08901-8551
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