Turning a factor into a number is not trivial. Using as.numeric would only return to us the indicator numbers and NOT the factor levels turned into a number. fac2num simply turns a factor into a number, as we often need.
as.numeric
fac2num(x, force_integer = FALSE, keep_names = TRUE, ...)
an object.
logical (FALSE). Should the values returned be integers?
logical (TRUE). Should the values returned keep the names of the original vector?
ignored.
if x is an object - it returns logical - is the object of class dendrogram.
# NOT RUN { x <- factor(3:5) as.numeric(x) # 1 2 3 fac2num(x) # 3 4 5 # }
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