R Under development (unstable) (2023-11-08 r85496 ucrt) -- "Unsuffered Consequences"
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> ##
> ##  r e p m a t . R  Test Suite
> ##
> 
> repmat <- pracma::repmat
> Reshape <- pracma::Reshape
> 
> v <- c(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
> a <- matrix(v, 3, 4)
> identical(Reshape(a, 4, 3), matrix(v, 4, 3))
[1] TRUE
> 
> identical(repmat(matrix(1:4, 2, 2), 3),
+           matrix(rep(c(rep(c(1,2), 3), rep(c(3, 4), 3)), 3), nrow=6, ncol=6))
[1] TRUE
> 
> proc.time()
   user  system elapsed 
   0.12    0.03    0.14