[R] logit newbie question...

[yoooooo]

Hi, I'm new to the glm and logit world... and I'm reading some lecture notes
and examples. I would like to try and generate the same result in R.. but I
don't seem to be able to find the proper way to specify the formula....
let's say i have

Desire     Using Drugs     Not Using Drugs
Yes             219                     753
No               288                     347

Desire is my explanatory and Drugs Using is my response... 

How can I specify the null model? Namely 
     logit(pi) = n
where mle should give n to be logit((219+288)/(753+347))

Also, if I want a one factor model
      logit(pi1) = n 
      logit(pi2) = n + alpha   
where mle should give me n to be logit(219 / 972) and alpha be
logit(288/635) - logit(219/972)

Thanks!



-- 
View this message in context: http://www.nabble.com/logit-newbie-question...-tp16850195p16850195.html
Sent from the R help mailing list archive at Nabble.com.