[R] Controlling the Output from table()

[Öhagen Patrik]

Sorry for the vaugness.

I have text data (exam grades, say) for different courses and I want to table them. In my table I want the frequency for the lowest grade first and the other frequencies in increaseing (grade) order. Some frequencies might be zero but I want to include those empty cells in my table.

I hope that made sense?

Thank you in advance!


Cheer, Patrik

-----Ursprungligt meddelande-----
Från: Prof Brian Ripley [mailto:ripley at stats.ox.ac.uk] 
Skickat: den 7 oktober 2007 09:11
Till: Öhagen Patrik
Kopia: r-help at stat.math.ethz.ch
Ämne: Re: [R] Controlling the Output from table()

On Sun, 7 Oct 2007, Öhagen Patrik wrote:

>
>
>
> Dear All,
>
> I would like to have some controll over the output from the function 
> table(). I want to controll the order of the cells and I want to include 
> empty cells (if any).
>
> Example: I have ordinal data wich takes the values 1,2,3....N but I want 
> the output from table to put the frequencies in a different order, say, 
> 3,7,1,4.... and I want to include categories with zero frequency.
>
> How is that done?

See ?tabulate.  You can reorder the result via indexing: I don't follow 
what you want and you did not give us an example.  (For example, is 
'ordinal data' represented by an ordered factor or by an integer vector?)

-- 
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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