Let's say I have a variable, day, which is saved as a factor with 7 levels,
and I use it in a
logistic regression model. I ran the model using the car package in R and
printed out the
results.
mod1 = glm(factor(status1) ~ factor(day), data=mydat,
family=binomial(link="logit"))
print(summary(mod1))
The result I get is:
Coefficients:
Estimate Std. Error z value Pr(>|z|)
(Intercept) -0.4350 0.0379 -11.48 <2e-16 ***
factor(day)Monday -0.6072 0.0479 -12.69 <2e-16 ***
factor(day)Saturday 0.5964 0.0559 10.67 <2e-16 ***
factor(day)Sunday 1.1140 0.0627 17.78 <2e-16 ***
factor(day)Thursday -0.4492 0.0516 -8.71 <2e-16 ***
factor(day)Tuesday -0.9331 0.0496 -18.82 <2e-16 ***
factor(day)Wednesday -0.8575 0.0486 -17.63 <2e-16 ***
It seems that Friday is being used as the baseline, but I want to know
how I can acquire the coefficient for the baseline (friday)?
I ran mod1$coefficients, but that didn't do the trick.
Can anyone help.
Thank you,
Abraham M.
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