Hi,
I'm new to logistic regression and therefore this stupid question:
What I have understand from logistic regression is that the binary
response variable is transformed to log(p/(1-p)).
1) How is the fraction p calculated for an individual response value (0
or 1). Probably, if for a certain predictor value only 1 response is
available the fraction is aslo always 1 or 0, or is the fraction p
calculated a pre-specified range for a predictor value?
2) I'm analysing the Kyphosis dataset that comes with Splus. How are
these binary response values transformed and how can i check in Splus
how this was done. Is there any variable that contains the transformed
response values?
Any help is appreciated
--
---------------------------------------
| Dr. Antoine H.C. van Kampen |
| Academic Medical Center Amsterdam |
| Bioinformatics Laboratory |
| K2-211 |
| Postbus 22660 |
| 1100 DD Amsterdam, the Netherlands |
-------------------------------------------------|
| Phone: ++31-20-5667096 |
| Mobile 06-10213310 |
| Email: a.h.vankampen@amc.uva.nl |
| www: http://www.amc.uva.nl/ |
-------------------------------------
|