# [R] Pasting a list of parameters into a function

bsm2 bsm2 at rice.edu
Thu Jan 24 17:01:37 CET 2013

```I'm still having trouble, I think that I may have poorly explained the
problem I'm running into.

The code I'm working with looks like this:

mle.nb<-function(l,a,b,s){
t1pred=(data\$T*l)/(1+a*data\$T)^b

-sum(dnbinom(x=data\$T.1, mu=t1pred, size=s,log=TRUE))
}

fit.mle.nb=mle2(mle.nb, start=list(l=2, a=1, b=1, s=1), method =

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, for example:

l=1

mle.nb<-function(a,b,s){
t1pred=(data\$T*l)/(1+a*data\$T)^b

-sum(dnbinom(x=data\$T.1, mu=t1pred, size=s,log=TRUE))
}

fit.mle.nb=mle2(mle.nb, start=list(a=1, b=1, s=1), method =

I would like to be able to rewrite this code as something like:

q<-("l,a,b,s") #or something like this, I'm not sure if this should be
formatted as a data frame or something else

mle.nb<-function(q){
t1pred=(data\$T*l)/(1+a*data\$T)^b

-sum(dnbinom(x=data\$T.1, mu=t1pred, size=s,log=TRUE))
}

fit.mle.nb=mle2(mle.nb, start=list(a=1, b=1, s=1), method =

####

I tried the previously suggested solutions and couldn't get them to work.  I
apologize if I'm being dense!

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```