Switched to use self.ei, self.si, self.mi, self.oi, self.di.
This is for better reading of code.
Task #7807 (https://gna.org/task/index.php?7807): Speed-up of dispersion models for Clustered analysis.
Authored by: tlinnet 2014-06-11
Parent: [r23814]
Child: [r23816]
