Feature Request: derive_var_shift()

[yangc71]

Feature Idea

derive_vars_shift() should derive a variable containing character shift in values depending on the defined pairing for the group (e.g. 'NORMAL TO HIGH'). Can also include deriving a numeric shift variable. There must be a one-to-one relationship between the character shift and the numeric shift variable. UPDATE: handle corresponding numeric variables with mutate() instead.

Related discussion #552, ADLB workflow doc

Relevant Input

BDS structure dataset (e.g. ADLB) with variables used to derive shift values present.

Relevant Output

Dataset with shift variable added.

Reproducible Example/Pseudo Code

draft example call: derive_vars_shift(dataset = ADLB, from_var = BNRIND, to_var = ANRIND, new_var = SHIFT1, ...)