pedestal and rms from Tonko's file

from Tonko :
As an example, I generated 3 files for the first 3 RDOs.
Find them on daqman:/log/sst_pedestals_s1_r1.txt
(and r2 & r3).
RDO_0  : Ladder 1N to Ladder 8N (correspond to fiber 0 to fiber 7)
RDO_1  : Ladder 9N to Ladder 16N (correspond to fiber 0 to fiber 7)
RDO_2  : Ladder 17N to Ladder 20N + Ladder1P to Ladder 4P (correspond to fiber 0 to fiber 7)

plots are pedestal and rms vs. channel (I don't know if it;s RDO channel or silicon strip)