R Under development (unstable) (2025-09-02 r88773 ucrt) -- "Unsuffered Consequences"
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> #
> # Test out subscripting
> #
> require(kinship2)
Loading required package: kinship2
Loading required package: Matrix
Loading required package: quadprog
Warning: kinship2 package is deprecated for R <= 4.5; switch functionality to Pedixplorer from BioConductor> data(minnbreast)
> 
> minnped <- with(minnbreast, pedigree(id, fatherid, motherid, sex,
+                                      affected=cancer, famid=famid))
> ped8 <- minnped['8']  # a modest sized family
> 
> # Subjects 150, 152, 154, 158 are children, and 143, 162, 149 are 
> #  parents and a child
> droplist <- c(150, 152, 154, 158, 143, 162, 149)
> 
> keep1 <- !(ped8$id %in% droplist)  #logical
> keep2 <- which(keep1)              #numeric
> keep3 <- as.character(ped8$id[keep1]) #character
> keep4 <- factor(keep3)
> 
> test1 <- ped8[keep1]
> test2 <- ped8[keep2]
> test3 <- ped8[keep3]
> test4 <- ped8[keep4]
> all.equal(test1, test2)
[1] TRUE
> all.equal(test1, test3)
[1] TRUE
> all.equal(test1, test4)
[1] TRUE
> 
> proc.time()
   user  system elapsed 
   1.20    0.17    1.31