Displaying 2 results from an estimated 2 matches for "asfr1".
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asfr
2010 Apr 15
2
using nls for gamma distribution (a,b,d)
...stimated the parameter of the gamma density(a,b,d)
f(x) = (1/gamma(b)*(a^b)) * ((x-d)^(b-1)) * exp{-(x-d)/a)} for x>d
f(x) = Age specific fertility rate
x = age
when i run this in R by usling nls()
gamma.asfr <- formula(asfr ~ (((age-d)^(b-1))/((gamma(b))*(a^b)))*
exp(-((age-d)/a)))
gamma.asfr1 <- nls(gamma.asfr, data= asfr.aus, start = list(b = 28, a = 1,
d= 0.5), trace = TRUE)
error: Error in numericDeriv(form[[3L]], names(ind), env) : Missing value
or an infinity produced when evaluating the model
when I use plinear algoritm, and run this
gamma.asfr1 <- nls(gamma.asfr, data=...
2010 Apr 15
4
Does "sink" stand for anything?
Hello Everyone,
Learning about R and its wonderful array of functions. If it's not obvious, I usually try to find out what a function stands for. I think this helps me remember better.
One function that has me stumped is "sink." Can anyone tell me if this stands for something?
Thanks,
Paul
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