Displaying 3 results from an estimated 3 matches for "explp".
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2012 Feb 07
2
Actual vs. predicted survival times
...ita = coxph(Surv(tsecond,seccens)~stroke(smess)+rels(smess)+asleep(smess)+eeg1(smess)+eeg2(smess)+ct1(smess)+ct2(smess)+treat(smess),data=smess)
# Find censored and observed groups #
messcens <- subset(smess,seccens==1)
messobs <- subset(smess,seccens==0)
# Obtain predicted survival times #
explp <- exp(predict(coxfita,type="lp"))
explp2 <- mean(ssmess$tsecond,na.rm=TRUE)*explp
smess2 <- data.frame(ssmess,explp2)
# Find censored and observed groups #
smesscens <- subset(smess2,seccens==1)
smessobs <- subset(smess2,seccens==0)
# Produce plot #
plot(smesscens$explp2...
2012 Apr 29
0
need help with avg.surv (Direct Adjusted Survival Curve)
...kp]
tframe <- mframe[rep(1,length(var.values)),]
tframe[,var.num] <- var.values
xmat <- model.matrix(cfit,data=tframe)[,-1]
tlps <- as.vector(xmat%*%cfit$coef)
names(tlps) <- var.values
obs.off <- tlps[as.character(obs.var)]
explp.off <- exp(outer(lps - obs.off ,tlps,"+"))
bfit <- survfit.coxph(cfit, se.fit = F)
fits <- outer(bfit$surv,explp.off,function(x,y) x^y)
avg.fits <-
apply(sweep(fits,2,weights,"*"),c(1,3),sum)/sum(weights)
dimnames(avg.fits) <- l...
2012 Apr 30
0
need help with avg.surv (Direct Adjusted Survival Curve), Message-ID:
...tframe <- mframe[rep(1,length(var.values)),]
tframe[,var.num] <- var.values
xmat <- model.matrix(cfit,data=tframe)[,-1]
tlps <- as.vector(xmat%*%cfit$coef)
names(tlps) <- var.values
obs.off <- tlps[as.character(obs.var)]
explp.off <- exp(outer(lps - obs.off ,tlps,"+"))
bfit <- survfit.coxph(cfit, se.fit = F)
fits <- outer(bfit$surv,explp.off,function(x,y) x^y)
avg.fits <-
apply(sweep(fits,2,weights,"*"),c(1,3),sum)/sum(weights)
dimnames(avg.fits) <...