[R] question regarding is.factor()

[Prof Brian Ripley]

typeof() for 'types'.

However, "factor" is not a type but a class, so class() is probably what 
you want.

On Mon, 13 Aug 2007, Jabez Wilson wrote:

> Dear all, please help with what must be a straightforward question which 
> I can't answer.

But 'An Introduction to R' could.

>  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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-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
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