[R] VGAM package : Frechet distribution - 2 parameter estimation

[Rolf Turner]

Dear Ms. Gobin,

There would appear to be a typo in the package manual that appears on 
CRAN.  Doing ?Frechet (it would be nice to have this aliased also to 
"frechet") points you immediately to frechet.  With "frechet2" 
substituted for "frechet" your code, everything works.

cheers,

Rolf Turner

On 06/11/14 22:34, Katherine Gobin wrote:
> Dear Mr Michael,
>
> Thanks a lot for your guidance. The pdf file describing VGAM package has mentioned 'frechet' in the example, so I got the error.
>
> Regards
> Katherine
>
>
> On Thursday, 6 November 2014 2:54 PM, Michael Dewey <info at aghmed.fsnet.co.uk> wrote:
>
>
>
>
>
> On 06/11/2014 06:04, Katherine Gobin wrote:
>> Dear R forum,
>>
>> I am trying to execute following code (Page no 259 - VGAM.pdf)
>>
>> # .........................................................................................................................
>>
>> library(VGAM)
>>
>> set.seed(123)
>> fdata <- data.frame(y1 = rfrechet(nn <- 1000, shape = 2 + exp(1)))
>> with(fdata, hist(y1))
>> fit2 <- vglm(y1 ~ 1, frechet, data = fdata, trace = TRUE)
>>
>> # .........................................................................................................................
>>
>
> Is it not called frechet2?
>
>>
>> However, I receive following error
>>
>> Error in vglm(y1 ~ 1, frechet, data = fdata, trace = TRUE) :
>>     object 'frechet' not found
>>
>>
>> Earlier there used to be a function called "frechet3" which I guess has been withdrawn by VGAM.
>>
>> Kindly guide
>>
>> Katherine

-- 
Rolf Turner
Technical Editor ANZJS