> I'm trying to iterate model fits while holding one variable
> (l,a,b or s) constant. In order to do this, each time I need
> to re-run the mle2 fit with one variable held constant,
Have you read the help page closely enough, I wonder?
If I look at the mle2 help page, I see an argument called 'fixed' described as
"Named list. Parameter values to keep fixed during optimization."
Looking at the first example, i see an example of that in the line
fit1F <- mle2(LL, fixed=list(xhalf=6))
If I run that, I see mle2 use xhalf as a fixed parameter, iterating only over
the remaining parameter, y
That looks awfully like what you seem to want, with no change to your negative
log-likelihood function at all.
S Ellison
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