[R] How to pass a model formula as argument to with.mids
erich.studerus at bli.uzh.ch
Thu Sep 23 15:53:45 CEST 2010
I would like to pass a model formula as an argument to the with.mids
function from the mice package. The with.mids functon fits models to
multiply imputed data sets.
Here's a simple example
#Create multiple imputations on the nhanes data contained in the mice
imp <- mice(nahnes)
#Fitting a linear model with each imputed data set the regular way works
#Creating a formula object and than passing it as argument does not work:
form.obj <- formula(bmi~hyp+chl)
#The following doesn't work either
Looking at the definition of with.mids reveals that the second argument
is first substituted and than evaluated within each data.frame of the
multiply imputed data sets. Is there a way to pass "lm(bmi~hyp+chl)"
without having to change the definition of the with.mids function?
Thanks in advance,
More information about the R-help