Changes to inplace operations for large dataframes.

plot_transmission_timeline.py

 
     # CDF
     transmission_df["cdf"] = transmission_df["pdf"].cumsum()
-    transmission_df = transmission_df.reset_index()
+    #transmission_df = transmission_df.reset_index()
 
     transmission_df.plot(x="goodput", y=["cdf"], grid=True)