[R] summary(object) not showing all values of a factor

[PIKAL Petr]

Hi

see

?contrasts
?model.matrix

go through archives

and through chapter

11.1.1 Contrasts

from R-Intro document.

Anyway, when you go through this chapter you will probably benefit from reading previous chapters too.

Regards
Petr


> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of Soumitro Dey
> Sent: Tuesday, September 03, 2013 8:51 PM
> To: r-help at r-project.org
> Subject: [R] summary(object) not showing all values of a factor
> 
> Dear all,
> 
> I am encountering some odd results from the summary(object) command for
> coxph and hurdle models. In both cases the result of summary(object)
> function leaves out one of the categories of a categorical variable
> used in the model. It is typically the first category if sorted
> alphabetically. Is there any way around this problem?
> 
> For example, if I have categorical variable "type" with values
> {A,B,C,D,E}, it typically leaves out A in the result of the summary.
> 
> Thanks!
> 
> 	[[alternative HTML version deleted]]
> 
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