Hi everybody,
I have to solve a score function by using Newton-Raphson algorithm. Is there
such a fucntion in R? I have built this algoritm
newton-function(tgt,drva,th0,err) {
iter=0
repeat {iter = iter+1
th1=th0-tgt(th0)/drva(th0)
if (abs(th0-th1)err||abs(tgt(th1)).1e-10)
break
th0=th1}
th1
}
Hi everybody,
we are a pool of phd students and we have a question about AIC. We are
interested
in calculating the AIC for a mixture model on galaxies data. So far we have
found AIC works only for regression models, whereas we need AIC for a mixture
of Normal with mean, sd and weights given by
