[R] logistic regression using "glm",which "y" is set to be "1"
leffgh at 163.com
Thu Dec 6 04:41:37 CET 2007
Dear Marc Schwartz:
When I ask R2.6.0 for windows, the information it gives does not contain
much about family=binomial .
You said that there is a detail section of "?glm". I want to read it
thoroughly. Could you tell me where and how I can find the detail section
Thank you very much .
Marc Schwartz wrote:
> On Wed, 2007-12-05 at 18:06 -0800, Bin Yue wrote:
>> Dear friends :
>> using the "glm" function and setting family=binomial, I got a list of
>> The coefficients reflect the effects of predicted variables on the
>> probability of the response to be "1".
>> My response variable consists of "A" and "D" . I don't know which level
>> the response was set to be 1.
>> is the first element of the response set to be 1?
>> Thank all in advance.
>> Best regards,
>> Bin Yue
> As per the Details section of ?glm:
> For binomial and quasibinomial families the response can also be
> specified as a factor (when the first level denotes failure and all
> others success) ...
> So use:
> and that will give you the factor levels, where the first level is 0 and
> the second level is 1.
> If you work in a typical English based locale with default alpha based
> level ordering, it will likely be A (Alive?) is 0 and D (Dead?) is 1.
> Marc Schwartz
> R-help at r-project.org mailing list
> PLEASE do read the posting guide
> and provide commented, minimal, self-contained, reproducible code.
student for a Master program in South Botanical Garden , CAS
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