R Under development (unstable) (2025-02-26 r87830 ucrt) -- "Unsuffered Consequences"
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> library(flexclust)
> 
> ## Canberra is really only defined for >= 0 matrices, and changed 
> ## in dist in 2018
> 
> ## create a random matrix
> x <- abs(matrix(rnorm(1000), ncol=4))
> rownames(x) <- 1:nrow(x)
> 
> ## test canberra at margin
> x[1:10,1] <- 0
> x[1:20,2] <- 0
> x[1:30,3] <- 0
> 
> stopifnot(all.equal(dist2(x,x,"eucl"), as.matrix(dist(x, "eucl"))))
> stopifnot(all.equal(dist2(x,x,"man"), as.matrix(dist(x, "man"))))
> stopifnot(all.equal(dist2(x,x,"max"), as.matrix(dist(x, "max"))))
> stopifnot(all.equal(dist2(x,x,"bin"), as.matrix(dist(x, "bin"))))
> stopifnot(all.equal(dist2(x,x,"can"), as.matrix(dist(x, "can"))))
> 
> stopifnot(all.equal(dist2(x,x,"eucl"), dist2(x,x,"mink",p=2)))
> stopifnot(all.equal(dist2(x,x,"man"), dist2(x,x,"mink",p=1)))
> 
> proc.time()
   user  system elapsed 
   0.59    0.07    0.67