The Rp/Ec Trend Analysis package is used to graph and manipulate the data from Rp/Ec Trend experiments. In an Rp/Ec Trend experiment, polarization resistance Rp is repeatedly measured at set time intervals. The resulting data consist of both Rp and Ecorr measured versus time.

The normal plot type for the Rp/Ec Trend package has Rp plotted on the y-axis and time is plotted on the x-axis.