Dear all, please help with what must be a straightforward question which I
can't answer.
I add a column of my dataframe as factor of an existing column e.g.
df[,5] <- factor(df[,2])
and can test that it is by is.factor()
but if I did not know in advance what "types" the columns were, is there a
function to tell me what they are.
i.e. instead of is.factor(), is.matrix(), is.list(), a function more like
what.is()
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