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# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - # # Basic Commands and Statistics with R - 1.2 - permutations # path: ~/ownCloud/STA_Statistics/Basic_Statistics/ # file_name: statistic_basics3.R # files_used: #install.packages( 'gtools' ) library( gtools ) #install.packages( "combinat" ) library( combinat ) #install.packages( "magrittr" ) library( "magrittr" ) # - - - - - - - - - - - - - - - - # x <- 6 factorial( x ) # [1] 720 for( i in 1:x ) print( factorial( i ) ) # [1] 1 # [1] 2 # [1] 6 # [1] 24 # [1] 120 # [1] 720 # - - - - - - - - - - - - - - - - # x <- c( "a", "b", "c" ) combinat::permn( x ) # [[1]] # [1] "a" "b" "c" # [[2]] # [1] "a" "c" "b" # [[3]] # [1] "c" "a" "b" # [[4]] # [1] "c" "b" "a" # [[5]] # [1] "b" "c" "a" # [[6]] # [1] "b" "a" "c" # - - - - - - - - - - - - - - - - # string conversion using combinat:: x <- "ABCDEFG" x <- strsplit( x, "" )[[1]] y <- combinat::permn( x ) y x <- LETTERS[1:5] y <- combinat::permn( x ) paste( y[[1]], collapse = "" ) for( i in 1:length( y ) ) print( paste( y[[i]], collapse = "" ) ) # - - - - - - - - - - - - - - - - # using gtools:: for permutations gtools::permutations( 5, 5, x ) # [,1] [,2] [,3] [,4] [,5] # [1,] "A" "C" "I" "M" "P" # [2,] "A" "C" "I" "P" "M" # [3,] "A" "C" "M" "I" "P" # [4,] "A" "C" "M" "P" "I" # [5,] "A" "C" "P" "I" "M" # ... gtools::permutations( 5, 5, x, repeats.allowed = TRUE ) # [,1] [,2] [,3] [,4] [,5] # [1,] "A" "A" "A" "A" "A" # [2,] "A" "A" "A" "A" "C" # [3,] "A" "A" "A" "A" "I" # [4,] "A" "A" "A" "A" "M" # [5,] "A" "A" "A" "A" "P" # [6,] "A" "A" "A" "C" "A" # [7,] "A" "A" "A" "C" "C" # [8,] "A" "A" "A" "C" "I" # [9,] "A" "A" "A" "C" "M" # [10,] "A" "A" "A" "C" "P" # ... # - - - - - - - - - - - - - - - - # using gtools:: for combinations gtools::combinations( 4, 2, x ) gtools::combinations( 5, 2, x ) gtools::combinations( 5, 3, x ) gtools::combinations( 4, 2, x, repeats.allowed = TRUE ) gtools::combinations( 2, 5, x, repeats.allowed = TRUE ) # Martin Stoppacher # # office@martinstoppacher.com # # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - # ################################################################################# |
Basic R commands – 1.2 – permutations
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