proc.prepareLoanbook4analysis: Take matched loanbook and prepare dataset for analysis...
In 2DegreesInvesting/pacta: Paris Agreement Capital Transition Assessment

Function adds columns necessary for analysis based on input attribute values

1 2	proc.prepareLoanbook4analysis(loanbook, exposure.type, customer.level, ald.levels, ald.ids, ald.names)

`loanbook`	matched loanbook data - contains pairs of attribues with ALD Level, ALD ID, ALD Name
`exposure.type`	defines what value to put as LoanSize (Outstanding, Exposure)
`customer.level`	Name of level on which mathcing is done
`ald.levels, ald.ids, ald.names`	vectors of values that represent reference to asset-level data. Vectors must be of same length as number of rows in loanbook.