[R] Sorting Data?

[Martin Klaffenboeck]

Hello,

Im reading through some manuals, but I cannot find my answer.

I have a file containing many data:

Vpn	Code	Family	Age	F1	F2	...	F17
1	1	M	46	1	2	...	1
2	1	D	18	3	2	...	4
3	2	M	50	3	3	...	3
...
and so on.

Now I can read it by:

F = read.table("file", header=T)

but now I want to seperate the mothers (M) and daugthers (D) of the  
family with all the data in all other fields.  How can I do that?

The 'Code' Tells me which mother belongs to which dougther.  I want to  
make a matrix where I have the mothers on one and the daugthers on the  
other axis and compair the distance of every question (F1...F17) and  
the distance of the sum of this questions.  The questions are semantic  
differencials, 5 values.  F4, and F7 must have reverse polarity in this  
case.

Hm.  How do I have to do now?

Thanks,
Martin