CDO

Given air temperature in Kelvin, pressure in Pascals, and specific humidity in kg/kg how can one derive Relative Humidity using CDO?

A function SH2RH has been written in R within the package 'Humidity' [[https://cran.r-project.org/web/packages/humidity/humidity.pdf]].

How can one implement the same reasoning in CDO? Sample data are attached.

Thank you.

Marvel.