This page describes the HV calibration of the eemc towers.
Run 6073013 was used to calculate gains from slopes. HV was changed if gain was more than 15% from ideal.
Input of this macro is the output from gainAverage.C. Output is summary files found below
4 plots on one canvas. # of PMT's which had their HV changed, average HV change, absolute value of HV change, maximum HV change
12 plots, one for each etabin, showing current gain in blue, yellow line which is ideal gain, 2 pink lines representing the boundaries of +/- 10%