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iforb3
2011 Feb 25
1
Forced inclusion of varaibles in validate command as well as step
...his is my present log over commands
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library(rms)
library(survival)
library(Hmisc)
data1 <- read.table("optimism.csv", header=T, sep=",")
attach(data1)
coxmodel4 <- coxph(formula=Surv(OS,mors) ~
iAJCC2+iAJCC3+iPS2+iPS3++alder_diag+gender+vol_GTV+iforb2+iforb3+hem_LNL+ser
o_thromb+LDH_UNL+ALAT_UNL+BASP_UNL+sero_bili+resection_perf+sero_WBC,
data=data1, x=TRUE, y=TRUE,method=c("efron"))
coxmodel.streg<-step(coxmodel4)
I would like to "lock" iAJCC2 iAJCC3 and iPS2 + iPS3 regardless, but I
cannot seem to get the step funct...