[R] Error when using fitdist function in R

[PIKAL Petr]

Hi

where is function fitdist from? Do you by chance mean fitdistr from MASS package?
What is result of str(k)?

Without these questions answered you hardly get any useful answer.

Regards
Petr



> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of Paul Bernal
> Sent: Tuesday, April 09, 2013 11:19 PM
> To: r-help at r-project.org
> Subject: [R] Error when using fitdist function in R
> 
> Hello everyone,
> 
> I  was trying to do some distribution fitting with a numerical field
> called Tolls. The sample size = 999 rows.
> 
> Basically I assigned the Toll data to a new variable K by doing:
> k<-dtest$Toll
> 
> After that, tried to fit a gamma distribution by doing: fitG<-
> fitdist(k,
> "gamma")
> 
> Then the following messages showed (oh and I checked for empty rows
> before doing this):
> 
> Warning in dgamma(c(363328L, 376216L, 367032L, 314826L, 311892L,
> 313340L,  :
>   NaNs produced
> Warning in dgamma(c(363328L, 376216L, 367032L, 314826L, 311892L,
> 313340L,  :
>   NaNs produced
> Warning in dgamma(c(363328L, 376216L, 367032L, 314826L, 311892L,
> 313340L,  :
>   NaNs produced
> Warning in dgamma(c(363328L, 376216L, 367032L, 314826L, 311892L,
> 313340L,  :
>   NaNs produced
> Warning in dgamma(c(363328L, 376216L, 367032L, 314826L, 311892L,
> 313340L,  :
>   NaNs produced
> Warning in dgamma(c(363328L, 376216L, 367032L, 314826L, 311892L,
> 313340L,  :
>   NaNs produced
> Warning in dgamma(c(363328L, 376216L, 367032L, 314826L, 311892L,
> 313340L,  :
>   NaNs produced
> Warning in dgamma(c(363328L, 376216L, 367032L, 314826L, 311892L,
> 313340L,  :
>   NaNs produced
> Warning in dgamma(c(363328L, 376216L, 367032L, 314826L, 311892L,
> 313340L,  :
>   NaNs produced
> Warning in dgamma(c(363328L, 376216L, 367032L, 314826L, 311892L,
> 313340L,  :
>   NaNs produced
> Warning in dgamma(c(363328L, 376216L, 367032L, 314826L, 311892L,
> 313340L,  :
>   NaNs produced
> Warning in dgamma(c(363328L, 376216L, 367032L, 314826L, 311892L,
> 313340L,  :
>   NaNs produced
> Warning in dgamma(c(363328L, 376216L, 367032L, 314826L, 311892L,
> 313340L,  :
>   NaNs produced
> Warning in dgamma(c(363328L, 376216L, 367032L, 314826L, 311892L,
> 313340L,  :
>   NaNs produced
> Warning in dgamma(c(363328L, 376216L, 367032L, 314826L, 311892L,
> 313340L,  :
>   NaNs produced
> Warning in dgamma(c(363328L, 376216L, 367032L, 314826L, 311892L,
> 313340L,  :
>   NaNs produced
> [1] "Error in optim(par = vstart, fn = fnobj, fix.arg = fix.arg, obs =
> data,  : \n  non-finite finite-difference value [2]\n"
> attr(,"class")
> [1] "try-error"
> attr(,"condition")
> <simpleError in optim(par = vstart, fn = fnobj, fix.arg = fix.arg, obs
> =
> data,     ddistnam = ddistname, hessian = TRUE, method = meth, lower =
> lower,     upper = upper, ...): non-finite finite-difference value [2]>
> Error in fitdist(k, "gamma") :
>   the function mle failed to estimate the parameters,
>                 with the error code 100
> >
> 
> 	[[alternative HTML version deleted]]
> 
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