[Bug Fix] Fixes Errors with Inflection point finder

This Bug Fix addresses two main bugs: errors in handling very noisy sbits and errors when analyzing chambers with missing vfats.

Description

Previously, if an SBitThresh scan had no region of negative slope this would cause the code to crash. This is now fixed and the inflection point of (0,0) is assigned to this spot.

Also, if an SBitThresh scan was done on a chamber with missing vfats, this would cause the analysis to crash. This is now handled by giving the inflection point of None

Types of changes

[x] Bug fix (non-breaking change which fixes an issue)
[ ] New feature (non-breaking change which adds functionality)
[ ] Breaking change (fix or feature that would cause existing functionality to change)

Motivation and Context

Previously, if an SBitThresh scan had no region of negative slope this would cause the code to crash. This is now fixed and the inflection point of (0,0) is assigned to this spot.

Also, if an SBitThresh scan was done on a chamber with missing vfats, this would cause the analysis to crash. This is now handled by giving the inflection point of None

How Has This Been Tested?

This was all tested in Bash with a python virtual environment.

#!/usr/bin/env bash

#=========================================================================================
# Testing Suite for the Inflection Point finder ------------------------------------------
#=========================================================================================

echo "Welcome to Brendan's Testing Suite for the Inflection Point Finder"
echo "------------------------------------------------------------------------------------"
echo "This script executes a bunch of files known to cause issues for the inflection"
echo "point finder"
echo "------------------------------------------------------------------------------------"

echo "Did you remember to update??? With make pip and pip install rpm*.tar.gz?"

echo "File 1"
echo "This tests how the code handles a vfat with a bad vfat"
echo "Please make sure (2,5,4) is filled in your system_specfic_constants.py file"

# This file causes issues because of a zero slope issue
anaSBitThresh.py /data/bigdisk/GEM-Data-Taking/GE11_QC8//sbitRate/channelOR/2019.10.25.13.59/SBitRateData.root

echo "File 2"
echo "This tests how the code handles a detector with missing vfats"
echo "Please make sure (1,2,0) is filled in your system_specfic_constants.py file"

# This file is from the coffin where the detector is missing vfats
anaSBitThresh.py /data/bigdisk/GEM-Data-Taking/GE11_Integration//sbitRate/channelOR//2019.10.24.17.45/SBitRateData.root

Screenshots (if appropriate):

Checklist:

[x] My code follows the code style of this project.
[ ] My change requires a change to the documentation.
[ ] I have updated the documentation accordingly.
[x] I have added tests to cover my changes.
[x] All new and existing tests passed.

cms-gem-daq-project / gem-plotting-tools