R Under development (unstable) (2025-08-17 r88631 ucrt) -- "Unsuffered Consequences"
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> # summary.R --- Test function summary
> 
> library(usl)
> 
> data(specsdm91)
> 
> u <- usl(throughput ~ load, specsdm91)
> 
> summary(u, digits=3)

Call:
usl(formula = throughput ~ load, data = specsdm91)

Efficiency:
    Min      1Q  Median      3Q     Max 
0.08757 0.16257 0.28600 0.56241 0.72115 

Residuals:
   Min     1Q Median     3Q    Max 
-81.66 -48.29 -25.09  29.52 111.09 

Coefficients:
        Estimate  Std. Error  t value  Pr(>|t|)    
alpha  2.773e-02   9.122e-03    3.040   0.03841  * 
beta   1.044e-04   1.988e-05    5.251   0.00629  **
gamma  9.000e+01   1.421e+01    6.332   0.00318  **
---
Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1

Residual standard error: 82.85 on 4 degrees of freedom

Scalability bounds:
limit: throughput 3246 (Amdahl asymptote)
peak:  throughput 1884 at load 96.52 
opt:   throughput 1542 at load 36.06 

> 
> proc.time()
   user  system elapsed 
   0.15    0.09    0.25