Displaying 2 results from an estimated 2 matches for "pube3".
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qube3
2012 Mar 21
0
multivariate ordinal probit regression vglm()
...e the predictor (age) and
one or more response variables (the stages of skeletal morphology).
For example, the pubic symphysis and auriclar surface (two joint
surfaces of the pelvis) may be observed in three and four stages,
respectively (see sample dataframe "refdata" below).
age pube3 auric4
1 32 3 2
2 42 3 2
3 27 2 1
4 39 2 1
5 85 3 4
I've had some success in fitting the ordinal probit model using both
polr(method="probit") in the MASS library and vglm() in the VGAM
l...
2012 Apr 04
0
multivariate ordered probit regression---use standard bivariate normal distribution?
...he two response variables separately. Any suggestions are welcome.
Again, if it helps in your response, I've included a link to the data
below. Thanks.
--Trey
Get the data (a *.csv file) here:
https://docs.google.com/open?id=0B5zZGW2utJN0TEctcW1oblFRcTJrNDVLOVBmRWRaQQ
unvar.prob1<-vglm(pube3~age,data=refdata,cumulative(link="probit",parallel=FALSE,reverse=TRUE))
> unvar.prob1
Call:
vglm(formula = pube3 ~ age, family = cumulative(link = "probit",
parallel = FALSE, reverse = TRUE), data = refdata)
Coefficients:
(Intercept):1 (Intercept):2 age:1 age:2
-1.65895567 -...