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2013 Feb 15
0
Ho w Do I Get Cox Model Convergence After Multiple Imputation
...h some of my predictor variables I first do multiple imputation as follows: library(foreign) library(Amelia) library(norm) set.seed(666) M=10 impdat <- NVP[,c("X_t0","X_t","nvp","adstatus","t0rwfa","ageatran","whostage","t0rhfa","vlsupp","t0rwfh","t0rvl","t0rcd4pc","postrantb","resistance","id")] round(apply(apply(impdat,c(1,2),is.na),2,mean),digits=3) # percentage of missing values myimp <- amelia(impdat, m=M, p2s=0, noms=c("postrantb&qu...