[R] Nagelkerke R square for Prediction data

[Tobias Erik Reiners]

Dear Helpers,

I tries to find an Package or script which deals with Nagelkerke R square.
I got Prediction data from Habitatmodels for an animal. Some researchers
use the the Nagelkerke R Square to confirm the Goodness of model. I  
would like to do this as well.
Data:
1  0.9847
1  0,7653
...
0  0,2456
0  0,0457
...

THanks a lot
-- 
Tobias Erik Reiners
Justus Liebig University
IFZ - Department of Animal Ecology
Heinrich-Buff-Ring 26-32
D-35392 Giessen  Germany