[R] Estimating parameters of log-normal distribution

From: Gunther Höning <gunther.hoening_at_ukmainz.de>
Date: Mon, 30 Jun 2008 11:26:53 +0200

Dear list,

I have to vectors:

x <- rep(c(2,4,8,24,48,72),2)
y
<-c(82543,169105,207615,96633,31988,7005,82687,172931,205541,101842,31898,69 50)

that follows a log-normal function as

f(x)= SO/(sqrt(2*pi)*sigma *x) * exp(-(ln x - mu)^2/(2*sigma^2))

that is a log-normal distribution multiplied with SO.

How can I estimate SO, mu and sigma in R ?

Wishes
Gunther



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