Unique perms

unique_perms is a function that computes all distinct permutations of a vector. Thus is produces the same output as using the built-in MATLAB commands unique(perms(V),'rows'), but it is significantly faster if there are many repetitions in the vector.

Syntax

 * PERM_LIST = unique_perms(V)

Argument descriptions

 * V: The vector to be permuted.

Examples
The following generates all unique permutations of the vector [1,1,2,2,1,2,1,3,3,3] in two different ways: using this unique_perms function, and by using matlab's built-in unique and perms functions. Using the unique_perms function is much faster when the vector has lots of repetitions (as in this case).