Initialise the permutation object

This function initialises the permutation object. It must be called before nextPerm can be called

initMC(x)

Arguments

x

a vector of integers, reals, logicals or characters

Value

a object of class mc which is a list containing elements

  • mode - the mode of the original data in x, "integer", "double", or mode(x)

  • set - either the multiset being permuted if mode is "integer" or a set of integers corresponding to the elements of the multiset

  • elements - if mode is not "integer" then this contains the elements being permuted otherwise NULL

  • length - the length of the multiset

  • mc - a pointer to the internal C++ Multicool object. Users should not use this unless they really know what they are doing

See also

nextPerm

Author

James M. Curran

Examples


x = c(1,1,2,2)
m1 = initMC(x)
m1
#> $mode
#> [1] "integer"
#> 
#> $set
#> [1] 1 1 2 2
#> 
#> $elements
#> [1] 1 2
#> 
#> $length
#> [1] 4
#> 
#> $mc
#> C++ object <0x55dd21fc8bd0> of class 'Multicool' <0x55dd21ddc6f0>
#> 
#> attr(,"class")
#> [1] "mc"

## a non-integer example

x = rep(letters[1:4],c(2,1,2,2))
m2 = initMC(x)
m2
#> $mode
#> [1] "character"
#> 
#> $set
#> [1] 1 1 2 3 3 4 4
#> 
#> $elements
#> [1] "a" "b" "c" "d"
#> 
#> $length
#> [1] 7
#> 
#> $mc
#> C++ object <0x55dd1f85ad80> of class 'Multicool' <0x55dd21ddc6f0>
#> 
#> attr(,"class")
#> [1] "mc"