On May 19, 2011, at 9:32 AM, Timothy Bates wrote:
Likewise it would help reduce confusion when
plot(~Source, data=Df) # works
# but
boxplot(~Source, data=Df)
# Error in boxplot.formula(~Source, data = Df) :
# 'formula' missing or incorrect
The formula isn’t missing or illformed, it’s that boxplot requires
formulae to have something on the left hand side.
It may not be "illformed" but the error message says instead that it
is "incorrect". Read the help page for boxplot (which would be the
first thing a right-thinking person would do upon getting such a
message) and it clearly implies that there needs to be a LHS
component. I would rather the R Core spend its time on other areas.
--
David Winsemius, MD
West Hartford, CT
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