R help - Dec 2008 - Creating Tabel for Mean, Deviance

Hi,

Can someone help me how to create a table for Min, Max, Mean, Deviance.

I have input data like this:

Person Age Child
1  5	17   2
2  5	17   0 			
3  5	17   1 			
4  5	20    2 			
5  5	20   3		
6  7	10   1
7  7	21   4	
8  7	21   5	
9  7	21   1


Now i want to create a table for the Min, Max, Deviance, and Mean. from the 
Child Value.

It should  look like this:

  Person  Age Min Max Mean Deviance 
					
1  5	17  0  1  0.61	0.62
2  5	18  1  2 1.61	1.62				
3  5	19  1  4  1.61	2.62				
4  5	20  2  4 2.63	1.42				
5  5	21  1  5  2.61	0.22				
6  7	17  0  1 0.61	0.52
7  7	18  1 2 1.61	0.72				
8  7	19  1  4  1.61	0.82				
9  7	20 1 4 2.63	0.12				



-----------------------------------------------------------------


what i can do is only manually:

data<- read.table("test.data")

Min(data$Child), Max(data$Child), Mean(data$Child), Deviance(data$Child)

I only know how to calculate. But i dont know how to buiild the tabell like 
this.


I would appreciate if someone can help me. Thanks in advance.

Edwin Sendjaja wrote:
> Hi,
>
> Can someone help me how to create a table for Min, Max, Mean, Deviance.
>   
Hi Edwin,
You might find that the describe function in the prettyR package does 
what you want.

Jim

Edwin Sendjaja schrieb:
> Hi,
>
> Can someone help me how to create a table for Min, Max, Mean, Deviance.
>
>   
Try the summaryBy function of the doBy package. The package has an
excellent vignette (=documentation).

hth
Stefan

Hi,

Thank you Stefan, 

I think, this package will do what I want.

Edwin
> Edwin Sendjaja schrieb:
> > Hi,
> >
> > Can someone help me how to create a table for Min, Max, Mean,
Deviance.
>
> Try the summaryBy function of the doBy package. The package has an
> excellent vignette (=documentation).
>
> hth
> Stefan