When given a Boolean formula (see details) and a
data.frame of cases and fuzzy
set score for conditions, computes for each case the score of the membership
in the set described by the formula
A data frame where the rows represent cases and the columns the sets. Column names must be as in the formula.
A string, list of strings or function representing a Boolean formula in disjunctive normal form
formula is a function, it must take a
data.frame and return
formula is a string or list of strings, the following conventions hold:
Set names must be capitalized in the formula and the data; if they are
lowercase, they are interpreted as the negation of the set.
formula is a string, logical 'or' is expressed as a '+',
and logical 'and' as a '*'.
formula is a list of strings, the strings are assumed to be
the dosjuncts and are concatenated with '+'.
The formula must be in disjunctive normal form, i.e. it must be a disjunction of
conjunctions of elementary or negated elementary sets. Example:
A*b*C + a*B
the fuzzy set score of the set described by the formula for each case in the data
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