[R] BY GROUP IN GEV

[Peter Maclean]

Hi Dennis:
I tried your suggestions and I am getting the following errors:

Error in x$CP1 : $ operator is invalid for atomic vectors
In addition: Warning message:
In sqrt(diag(varcov)) : NaNs produced

 Peter Maclean
Department of Economics
UDSM 



----- Original Message ----
From: Dennis Murphy <djmuser at gmail.com>
To: Peter Maclean <pmaclean2011 at yahoo.com>
Sent: Wed, June 22, 2011 11:37:02 PM
Subject: Re: [R] BY GROUP IN GEV

Hi:

I think you need

CP  <- lapply(MAS, function(x){gev(x$CP1, 100, method = "BFGS", control =
                    list(maxit = 500))})

See if that works out.

HTH,
Dennis

On Wed, Jun 22, 2011 at 4:06 PM, Peter Maclean <pmaclean2011 at yahoo.com> wrote:
> I am trying to run gev (general extreme value) function in “evir” package. My
> data is divided by state. I am using the following codes but it is not 
working.
> I will appreciate any help.
>
> #Split data
> MAS <- split(MA, MA$states)
>
> CP  <- lapply(MAS, function(x){gev(MAS$CP1, 100, method = "BFGS", control =
> list(maxit = 500))})
>
> the Error message is:
>
> Error in tapply(data, grouping, max) : arguments must have same length
>
> I know there are also “by” function,  but I could not figure it out how to use
> it.
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>