Re: [R] the observed "log odds" in logistic regression

2007-12-11 Thread Frank E Harrell Jr
Bernardo Rangel Tura wrote: > On Mon, 2007-12-10 at 19:42 -0800, Bin Yue wrote: > (...) >>My problem is this : in my data set , the IVs are continuous variables, >> do I still have to generate such a table and compute the log odds for each >> level of IV according to which the log odds are cal

Re: [R] the observed "log odds" in logistic regression

2007-12-11 Thread Bin Yue
Dieter Menne: Thank you for your reply! I know that I don't have to do any logit , but I want to understand how R fit the glm models. I will read the examples your suggested . Best regards, Bin Yue Dieter Menne wrote: > > Bin Yue 163.com> writes: > >> After reading the following two lin

Re: [R] the observed "log odds" in logistic regression

2007-12-10 Thread Dieter Menne
Bin Yue 163.com> writes: > After reading the following two links: > http://luna.cas.usf.edu/~mbrannic/files/regression/Logistic.html > http://www.tufts.edu/~gdallal/logistic.htm > I've known the mathematical basis for logistic regression.However I am > still not so sure about the "logit

Re: [R] the observed "log odds" in logistic regression

2007-12-10 Thread Bernardo Rangel Tura
On Mon, 2007-12-10 at 19:42 -0800, Bin Yue wrote: (...) >My problem is this : in my data set , the IVs are continuous variables, > do I still have to generate such a table and compute the log odds for each > level of IV according to which the log odds are calculated? If IV is a continuous

[R] the observed "log odds" in logistic regression

2007-12-10 Thread Bin Yue
Dear list: After reading the following two links: http://luna.cas.usf.edu/~mbrannic/files/regression/Logistic.html http://www.tufts.edu/~gdallal/logistic.htm I've known the mathematical basis for logistic regression.However I am still not so sure about the "logit " For a categoric