R Under development (unstable) (2025-08-17 r88631 ucrt) -- "Unsuffered Consequences"
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> # warn-accuracy.R --- Warn if not enough data
> 
> library(usl)
> 
> options(digits=1, scipen=7)
> 
> data(raytracer)
> 
> r <- raytracer[1:5, ]
> 
> u <- usl(throughput ~ processors, data=r)
Warning message:
In usl(throughput ~ processors, data = r) :
  'data' has only a few values; the result might not be accurate
> 
> coef(u)
 alpha   beta  gamma 
 0.028  0.001 21.059 
> 
> proc.time()
   user  system elapsed 
   0.17    0.06    0.21