Hi,
I am trying to do parameter estimation with optim, but I can't get it to
work quite right-- I have an equation X = Y where X is a gaussian, Y is a
multinomial distribution, and I am trying to estimate the probabilities of
Y( the mean and sd of X are known ), Theta1, Theta2, Theta3, and
1. Have you considered parameterizing the problem in terms of
(Theta1, Theta2, Theta3), and then computing Theta4 -
(1-Theta1-Theta2-Theta3) in the function you ask optim to optimize?
2. Beyond this, I don't understand what you are trying to do. Do
you want to estimate a
]
Subject: Re: [R] questions about optim
Date: Sat, 15 May 2004 13:38:38 -0700
1. Have you considered parameterizing the problem in terms of
(Theta1, Theta2, Theta3), and then computing Theta4 -
(1-Theta1-Theta2-Theta3) in the function you ask optim to optimize?
2. Beyond this, I don't
being clear. What are some
of the approaches that I can try in this case? Thanks.
Regards,
-Dean
From: Spencer Graves [EMAIL PROTECTED]
To: Dean Lee [EMAIL PROTECTED]
CC: [EMAIL PROTECTED]
Subject: Re: [R] questions about optim
Date: Sat, 15 May 2004 13:38:38 -0700
1. Have you considered
