R version 4.5.0 RC (2025-04-04 r88118 ucrt) -- "How About a Twenty-Six"
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Platform: x86_64-w64-mingw32/x64

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> library(CloneSeeker)
> 
> suppressWarnings( RNGversion("3.5.0") )
> set.seed(461283)
> sampleSimplex(4, 3)
           [,1]      [,2]      [,3]
[1,] 0.41142650 0.2341796 0.3543939
[2,] 0.37775202 0.2191589 0.4030891
[3,] 0.30840307 0.5882078 0.1033891
[4,] 0.05101856 0.7764820 0.1724994
> all( apply(sampleSimplex(4, 3), 1, sum) == 1) # assertion
[1] TRUE
> 
> generateSimplex(5, 3)
     [,1] [,2] [,3]
[1,]  1.0  0.0  0.0
[2,]  0.8  0.2  0.0
[3,]  0.6  0.4  0.0
[4,]  0.6  0.2  0.2
[5,]  0.4  0.4  0.2
> 
> # These should all fail, for obvious reasons.
> try( sampleSimplex(0) )
Error in `[<-`(`*tmp*`, i, , value = diff(sort(c(0, 1, runif(d - 1, 0,  : 
  subscript out of bounds
> try( sampleSimplex(-1) )
Error in matrix(NA, nrow = n, ncol = d) : invalid 'nrow' value (< 0)
> try( sampleSimplex(4, 0) )
Error in runif(d - 1, 0, 1) : invalid arguments
> try( sampleSimplex(4, -1) )
Error in matrix(NA, nrow = n, ncol = d) : invalid 'ncol' value (< 0)
> 
> proc.time()
   user  system elapsed 
   1.14    0.34    1.46