Francesco,
Please excuse both my late reply and my poor coding of the HR component. It was one of the first that I made and so it was not built with the same flexibility as my newer components. You can find attached a GH file with an updated HR component that can accept individual values:
This addresses your first question. For the second, it sound like you just want to export your data into an excel table. I recommend using the TTToolbox Excel Exporter:
http://www.food4rhino.com/project/tttoolbox?ufh
-Chris
HumRatio_CWM.gh (394 KB)