[R] Logistic and Linear Regression Libraries

[Mark Difford]

tdm wrote:

>> OK, I think I've figured it out, the predict of lrm didn't seem to pass
>> it through the logistic 
>> function. If I do this then the value is similar to that of lm. Is this
>> by design? Why would it 
>> be so?

Please take some time to read the help files on these functions so that you
at least understand that they fit different models.

?Design:::lrm
?Design:::predict.lrm
?Design:::datadist
?lm

This really is just a plainer way of saying what I said before.

HTH, Mark.


tdm wrote:
> 
> 
> OK, I think I've figured it out, the predict of lrm didn't seem to pass it
> through the logistic function. If I do this then the value is similar to
> that of lm. Is this by design? Why would it be so?
> 
> 1 / (1 + Exp(-1 * 3.38)) =  0.967
> 
> 
> tdm wrote:
>> 
>>  
>> Anyway, do you know why the lrm predict give me a values of 3.38?
>> 
>> 
> 
> 

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