17 Oct
2009
17 Oct
'09
11:25 a.m.
Hi Folks,
I'm getting some odd levels in my post-imputation data:
levels(as.factor(a.out$imputations[[1]]$facts_convict))
[1] "1"
"1" "2" "3" "4" "5" "6"
The "facts_convict" variable is imputed as ordinal, but the double
"1"s
aren't there prior to imputing:
levels(as.factor(my.data$facts_convict))
[1]
"1" "2" "3" "4" "5" "6"
Also, I can't seem to cure this by converting to numeric and back:
levels(as.factor(as.numeric(a.out$imputations[[1]]$facts_convict)))
[1]
"1" "1" "2" "3" "4" "5"
"6"
Not sure how/why the double "1" crept in during imputation. As you can
imagine, ologits end up being odd, with two estimates for "1". Any
thoughts?
Don
Donald Braman
phone: 413-628-1221
http://www.culturalcognition.net/braman/
http://ssrn.com/author=286206
http://www.law.gwu.edu/Faculty/profile.aspx?id=10123