[R] Hello! Problem - function ''matord'' in R

[Nikolaos Anagnostakis]

Hello! 

  I am developing an algorithm via the R program to create phylogenetic
trees and calculate values that interest me. On 2019 I had used a function
called ''matord'' but I can't find it anymore. Specifically I needed it for
calculation of two matrices for CI and RI.

  Is there anyone who could help me? 
  Is there a similar function?

Best Wishes

Nikos