R Under development (unstable) (2024-10-16 r87241 ucrt) -- "Unsuffered Consequences"
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> 
> require(OneStep)
Loading required package: OneStep
Loading required package: fitdistrplus
Loading required package: MASS
Loading required package: survival
Loading required package: numDeriv
Loading required package: parallel
Loading required package: extraDistr
> 
> n <- 1e3
> 
> #### standard student distribution ####
> 
> theta <- c("df"=3/2, "ncp"=0)
> o.sample <- rt(n, df = theta["df"], ncp = theta["ncp"])
> 
> mledist(o.sample, "t", start=list("df"=2), fix.arg=list("ncp"=0))
$estimate
      df 
1.537739 

$convergence
[1] 0

$value
[1] 2115.136

$hessian
         df
df 133.5676

$optim.function
[1] "optim"

$optim.method
[1] "BFGS"

$fix.arg
$fix.arg$ncp
[1] 0


$fix.arg.fun
NULL

$weights
NULL

$counts
function gradient 
      26        5 

$optim.message
NULL

$loglik
[1] -2115.136

$vcov
NULL

> onestep(o.sample, "t", control=list(delta=0.3))
Parameters:
   estimate Std. Error
df 1.518506         NA
> onestep(o.sample, "t", control=list(delta=0.75))
Parameters:
   estimate Std. Error
df 1.537732         NA
> 
> 
> proc.time()
   user  system elapsed 
   1.76    0.21    1.96