R Under development (unstable) (2025-08-17 r88631 ucrt) -- "Unsuffered Consequences"
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> # confint.R --- Test function confint
> 
> library(usl)
> 
> data(raytracer)
> 
> options(digits=3, scipen=6)
> 
> r <- raytracer[1:6, ]
> 
> u <- usl(throughput ~ processors, data = r)
> 
> coef(u)
   alpha     beta    gamma 
 0.02444  0.00163 20.85605 
> 
> confint(u)
         2.5 %   97.5 %
alpha  0.00754  0.04135
beta   0.00110  0.00215
gamma 19.26717 22.44492
> 
> confint(u, parm=1)
        2.5 % 97.5 %
alpha 0.00754 0.0414
> confint(u, parm="alpha")
        2.5 % 97.5 %
alpha 0.00754 0.0414
> 
> confint(u, parm=2)
      2.5 %  97.5 %
beta 0.0011 0.00215
> confint(u, parm="beta")
      2.5 %  97.5 %
beta 0.0011 0.00215
> 
> confint(u, parm=3)
      2.5 % 97.5 %
gamma  19.3   22.4
> confint(u, parm="gamma")
      2.5 % 97.5 %
gamma  19.3   22.4
> 
> confint(u, parm=4)
     2.5 % 97.5 %
<NA>    NA     NA
> confint(u, parm="none")
     2.5 % 97.5 %
<NA>    NA     NA
> 
> proc.time()
   user  system elapsed 
   0.25    0.01    0.26