Description Usage Arguments Value References See Also
slightly modified version of polr from MASS
1 2 3 
formula 
a formula 
data 
an optional data frame, list or environment (or object coercible
by 
weights 
optional case weights in fitting. Default to 1. 
start 
initial values for the parameters. 
... 
additional arguments to be passed to 
subset 
an optional vector specifying a subset of observations to be used in the fitting process. 
na.action 
a function which indicates what should happen when the data
contain 
contrasts 
a list of contrasts to be used for some or all of the factors appearing as variables in the model formula. 
Hess 
logical for whether the Hessian (the observed information matrix)
should be returned. Use this if you intend to call 
model 
logical for whether the model matrix should be returned. 
method 
logistic or probit or complementary loglog, loglog, or cauchit (corresponding to a Cauchy latent variable). 
A object of class "polr"
. This has components
coefficients 
the coefficients of the linear predictor, which has no intercept. 
zeta 
the intercepts for the class boundaries. 
deviance 
the residual deviance. 
fitted.values 
a matrix, with a column for each level of the response. 
lev 
the names of the response levels. 
terms 
the 
df.residual 
the number of residual degrees of freedoms, calculated using the weights. 
edf 
the (effective) number of degrees of freedom used by the model 
n, nobs 
the (effective) number of observations, calculated using the
weights. ( 
call 
the matched call. 
method 
the matched method used. 
convergence 
the convergence code returned by 
niter 
the number of function and gradient evaluations used by

lp 
the linear predictor (including any offset). 
Hessian 
(if 
model 
(if 
polr from MASS
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