R Under development (unstable) (2023-11-08 r85496 ucrt) -- "Unsuffered Consequences"
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> ##
> ##  m t r a c e . R  Test suite
> ##
> 
> Trace <- pracma::Trace
> 
> identical(Trace(1), 1)
[1] TRUE
> identical(Trace(matrix(c(1,2,3,4,5,6,7,8,9), 3, 3)), 15)
[1] TRUE
> # Error: Trace(matrix(1:12, 3, 4))
> 
> proc.time()
   user  system elapsed 
   0.12    0.04    0.15