dot-detectInputs: Detect inputs in a sample sheet
In ss-lab-cancerunit/SpiderSeqR: A Tool for Integration of Big Bio Data

Detect inputs in a sample sheet

1	.detectInputs(df)

`df`	Data frame to be checked (with a subset of sra columns)

Data frame with input column entries labelled as 'input' where appropriate

The entries are labelled as inputs based on the following rules. They strictly need to fulfill NECESSARY conditions as well as:

1A: have matches to ANTIBODY conditions
1B: have matches to MATCH conditions, provided no ANTIBODY information was provided
2: the whole SRP had no matches to ANTIBODY or MATCH conditions, but there is a match to OTHERWISE conditions

Further details on the conditions:

NECESSARY - these string matches are required (entries not fulfilling all necessary conditions will not be considered for labelling)
ANTIBODY - rows with non-empty sa_antibody column will only be labelled based on that field
MATCH - one of these string matches are sufficient to label an entry (provided it fulfils NECESSARY conditions and that it has an EMPTY (NA) sa_antibody field)
OTHERWISE - one of these string matches is sufficient to label an entry, but ONLY if none of the SRP members is labelled as input