Gamma Log Clean-Up for Report

Hello,

I am looking for a way to either clean a large set of gamma ray data for input into a gint log or for a way to apply some sort of best fit line into a log. I understand this can be done in the graph report design but I'm looking to do it in the actual log report design in a plot vs. depth graph.

 Trying to get this (left) to look like this (right)