Displaying 2 results from an estimated 2 matches for "yprisx".
Did you mean:
prism
2003 Oct 24
2
predict for a model with a subset
Hello
running R 1.7.1 on Windows 2000
I have a model
notmar1 <- glm(yprisx~age+harddrug+sex, subset = marcom == 0,
family = quasipoisson)
and summary(notmar1) gives (as it should) 433 df for the null model
but when I run
predict(notmar1 <- glm(yprisx~age+harddrug+sex, subset = marcom == 0,
family = quasipoisson))
I get preditions for 528 people (the full data set,...
2003 Jul 15
1
Tree question
...dependent
variable. e.g. Breiman Olshen et al. Classification and Regression
Trees state "In a standard data structure [a tree] is invariant under
all monotone transformations of individual ordered varaibles" (p. 57)
However, I get very different results from
tr.hh.pri <- rpart((log(YPRISX+1)~AGE+DRUGUSEY+SEX+OBSXNUM))
and
tr.hh.pri <- rpart(YPRISX~AGE+DRUGUSEY+SEX+OBSXNUM)
the former gives more splits and different splits.
Some notes:
The DV is a count variable, and highly skew, with some 0s, many 1s, and
a long right tail out to 99.
AGE ranges from 18-25
DRUGUSEY is ordered...