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jinrui
2011 Aug 31
6
Weights using Survreg
Dear R users,
I have been trying to understand what the Weights arguments is doing in the
estimation of the parameters when using the Surreg function.
I looked through the function's code but I am not sure if I got it or not.
For example, if I inclue the Surv function in it:
survreg(Surv(vector, status)~1,weights=vector2,dist="Weibull")
will it try to maximize the likelihood with
2011 Jan 17
0
[Fwd: Re: R-help Digest, Vol 95, Issue 17]
...--------------- Original Message ----------------------------
Subject: Re: R-help Digest, Vol 95, Issue 17
From: "Prof. John C Nash" <nashjc at uottawa.ca>
Date: Mon, 17 January, 2011 1:04 pm
To: r-help at r-project.org
Cc: ligges at statistik.tu-dortmund.de
jinruixu at umich.edu
--------------------------------------------------------------------------
For those issues with optimization methods (optim, optimx, and others) I
see, a good
percentage are because the objective function (or gradient if
user-supplied) is mis-coded.
However, an almost equal number ar...
2011 Jan 17
0
R-help Digest, Vol 95, Issue 17
...outcomes.
Beyond this, we get into reparametrizations. Great idea, but far too much work for most of
us, even if we work in the field.
Best,
JN
On 01/17/2011 06:00 AM, r-help-request at r-project.org wrote:
> From: Uwe Ligges <ligges at statistik.tu-dortmund.de>
> To: Jinrui Xu <jinruixu at umich.edu>
> Cc: r-help at r-project.org
> Subject: Re: [R] fgev_error_matrix_singular
2011 Jan 17
2
How to still processing despite bug errors?
.../Hausman-Test-tp3220016p3220016.html
> Sent from the R help mailing list archive at Nabble.com.
>
>
>
> ------------------------------
>
> Message: 12
> Date: Sun, 16 Jan 2011 15:10:41 +0100
> From: Uwe Ligges <ligges@statistik.tu-dortmund.de>
> To: Jinrui Xu <jinruixu@umich.edu>
> Cc: r-help@r-project.org
> Subject: Re: [R] fgev_error_matrix_singular
> Message-ID: <4D32FC61.5070606@statistik.tu-dortmund.de>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> See ?try in order to get the automated process going and for ign...