R Under development (unstable) (2023-11-07 r85491 ucrt) -- "Unsuffered Consequences"
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> ##
> ##  hankel.R  Test
> ##
> 
> hankel <- pracma::hankel
> 
> identical(hankel(2), matrix(2, nrow=1, ncol=1))
[1] TRUE
> identical(hankel(1:3), matrix(c(1,2,3,2,3,0,3,0,0), 3, 3))
[1] TRUE
> identical(hankel(1:3, 3:1), matrix(c(1,2,3,2,3,2,3,2,1), 3, 3))
[1] TRUE
> identical(hankel(1:3, 2:1), matrix(c(1,2,3,2,3,1), 3, 2))
[1] TRUE
Warning message:
In hankel(1:3, 2:1) : a[n] not equal to b[1], b[1] set to a[n].
> identical(hankel(1:2, 3:1), matrix(c(1,2,2,2,2,1), 2, 3))
[1] TRUE
Warning message:
In hankel(1:2, 3:1) : a[n] not equal to b[1], b[1] set to a[n].
> 
> proc.time()
   user  system elapsed 
   0.12    0.04    0.15