On Tue, 16 Jun 2015, Frank Harrell wrote:
Terry Therneau has been very helpful on r-help but we can't figure out what
change in R in the past months made extra columns appear in model.matrix when
the terms object is subsetted to remove stratification factors in a Cox
model. Terry has changed
Terry Therneau has been very helpful on r-help but we can't figure out
what change in R in the past months made extra columns appear in
model.matrix when the terms object is subsetted to remove stratification
factors in a Cox model. Terry has changed his logic in the survival
package to avoid
