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Accepts arbitrary un-parsed expressions as to allow forms such as "Sepal.Length >= 2 * Sepal.Width". (without the quotes).
qe(...)
assignment expressions.
array of quoted assignment expressions.
qc, qae
qc
qae
# NOT RUN { exprs <- qe(Sepal.Length >= ratio * Sepal.Width, Petal.Length <= 3.5) print(exprs) # }
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