BY GROUP IN GEV

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

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.

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