How to calculate combination and permutation in R

Question

How one can calculate the number of combinations and permutations in R  The Combinations package failed to install on Linux with the following message   gt  install packages  quot Combinations quot   Installing package s  into     home maxim R x86 64-pc-linux-gnu-library 2 13     as    lib    is unspecified  Warning message  In getDependencies pkgs  dependencies  available  lib      package    Combinations    is not available  for R version 2 13 1

User · Answer

The Combinations package is not part of the standard CRAN set of packages  but is rather part of a different repository  omegahat   To install it you need to use  install packages  Combinations   repos    http   www omegahat org R     See the documentation at http   www omegahat org Combinations

User · Answer

The function combn is in the standard utils package  i e  already installed   choose is also already available in the Special  base

User · Answer

It might be that the package  Combinations  is not updated anymore and does not work with a recent version of R  I was also unable to install it on R 2 13 1 on windows   The package  combinat  installs without problem for me and might be a solution for you depending on what exactly you re trying to do

User · Answer

If you don t want your code to depend on other packages  you can always just write these functions   perm   function n  x      factorial n    factorial n-x     comb   function n  x      factorial n    factorial n-x    factorial x

User · Answer

You can use the combinat package with R 2 13   install packages  combinat   require combinat  permn 3  combn 3  2    If you want to know the number of combination permutations  then check the size of the result  e g    length permn 3   dim combn 3 2   2

[r] How to calculate combination and permutation in R?

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