Permute all unique enumerations of a vector in R

Question

I\'m trying to find a function that will permute all the unique permutations of a vector, while not counting juxtapositions within subsets of the same element type.

Answer 1

One option that hasn't been mentioned here is the allPerm function from the multicool package. It can be used pretty easily to get all the unique permutations:

library(multicool)
perms <- allPerm(initMC(dat))
dim(perms)
# [1] 18900    10
head(perms)
#      [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10]
# [1,]    4    4    3    3    1    1    0    0    0     0
# [2,]    0    4    4    3    3    1    1    0    0     0
# [3,]    4    0    4    3    3    1    1    0    0     0
# [4,]    4    4    0    3    3    1    1    0    0     0
# [5,]    3    4    4    0    3    1    1    0    0     0
# [6,]    4    3    4    0    3    1    1    0    0     0

In benchmarking I found it to be faster on dat than the solutions from the OP and daroczig but slower than the solution from Aaron.