An alternative implementation of base::duplicated.matrix(), base:anyDuplicated.matrix() and base::unique.matrix() for matrices of atomic mode, avoiding the time consuming collapse of the matrix into a character vector. An extra grpDuplicated() function is added, which groups duplicated elements together.
copied from cf-staging / r-uniqueatommat
conda install conda-forge::r-uniqueatommatconda install conda-forge/label/cf201901::r-uniqueatommatconda install conda-forge/label/cf202003::r-uniqueatommatconda install conda-forge/label/gcc7::r-uniqueatommat