Coulomb Counting with SOC Recalibration

Hello all,

Currently i am developing a Coulomb Counting method with SOC Recalibration from SOC-OCV Lookup Table. I am working with an LFP Battery. I have a Data File of the Test i conducted. So the recalibration is done only during the Rest phase of the Battery.So the procedure is that when the SOC is less than 10% or more than 90%, the SOC should be recalibrated using interpolation from the SOC-OCV table( Depending on the Step before the Rest step. If it was charging, then SOC-OCV Lookup Table in Charge direction is looked up and otherwise the the table in discharge direction.) I am encountering problems with the programme. I am attaching the script. So in the 'recalibrateSOC' programme, the Table is just stored with NaN, the Recalibrated SOC's are not being updated. In the 2nd Programme where i combine Coulomb Counting with SOC Recalibration, an error is occuring in line 23. It would be of great help if someone could explain the issues and suggest actions for rectifying it.