Re: [R] r-help; weibull parameter estimate

On Jan 29, 2012, at 12:17 , Christopher Kelvin wrote: > Hello, > If i write a function as below using log of weibull distribution i do not get > the required > > results in estimating the parameters what do i do, please Presumably find and fix the error in your likelihood function! > z2 <- f

[R] r-help; weibull parameter estimate

Hello, If i write a function as below using log of weibull distribution i do not get the required results in estimating the parameters what do i do, please a/b * (t/b)^a-1 * exp(-t/b)^a n=500 x<-rweibull(n,2,2) z<-function(p) {(-n*log(p[1])+n*log(p[2])- (p[1]-1)*sum(log(x))+(p[1]-1)*log(p[2])