R Under development (unstable) (2023-11-06 r85483 ucrt) -- "Unsuffered Consequences"
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> library(kappalab)
Loading required package: lpSolve
Loading required package: quadprog
Loading required package: kernlab
> 
> mu <- set.func(rnorm(32))
> a <- Mobius(mu)
> ii1 <- interaction.indices(a)
> ii2 <- interaction.indices(mu)
> ii1[is.na(ii1)] <- 1
> ii2[is.na(ii2)] <- 1
> stopifnot(abs(ii1 -ii2) < 1e-6)
> 
> mu <- upper.capacity(6)
> stopifnot(abs(interaction.indices(mu)[1,1] - interaction.indices(as.set.func(mu))[1,2]) < 1e-6)
> 
> mu <- card.set.func(rnorm(12))
> mu2 <- as.set.func(mu)
> ii <- interaction.indices(mu2)
> stopifnot(abs(ii[1,2] -interaction.indices(mu)) < 1e-6)
> 
> proc.time()
   user  system elapsed 
   0.54    0.06    0.59