[R] silly, extracting the value of "C" from the results of somers2

[ahimsa campos arceiz]

Sorry I have a very simple question:

I used somers2 function from Design package:

> z<- somers2(x,y, weights=w)

results are:

>z
 C    Dxy    n    Missing
 0.88  0.76  500    0.00

Now I want to call only the value of C to be used in further analyses, but I 
fail to do it. I have tried:

> z$C
NULL
> z[,C]
Error in z[,C]: incorrect number of dimensions

and some other silly things. If I do 
>list(z)
[[1]]
  C    Dxy    n    Missing
 0.88  0.76  500    0.00

Can somebody tell me how can I obtain just the value of c?

Thank you useRs,

very gratefull

Ahimsa

-- 
Ahimsa Campos Arceiz
The University Museum,
The University of Tokyo
Hongo 7-3-1, Bunkyo-ku,
Tokyo 113-0033
phone +81-(0)3-5841-2824