Nothing
FHtestrcc.default <-
function(L, R, group, rho = 0, lambda = 0, alternative, ...)
{
if(class(group)[1] == "labelled") group <- as.vector(group)
if((!is.factor(group))&(!(is.vector(group)&is.numeric(group)))&(!(is.vector(group)&is.character(group)))) stop("group should be a factor, character, or numeric vector")
call <- match.call(expand.dots =TRUE)
L.name <- as.character(c(call$L))
R.name <- as.character(c(call$R))
group.name <- as.character(c(call$group))
if ((length(L.name) > 1) | (length(R.name) > 1) | (length(group.name) >
1)) {
L.name <- "L"
R.name <- "R"
group.name <- "group"
}
if ((sum(nchar(L.name)) + sum(nchar(R.name)) + sum(nchar(group.name))) >
50) {
L.name <- "L"
R.name <- "R"
group.name <- "group"
}
if(missing(alternative)||all(alternative!=c("different","increasing","decreasing"))) alternative="different"
if(sum(L == R)+sum((L<R)&(R == max(R)))!=length(L)) stop("This method needs right-censored data")
times <- L
status <- 1*(L == R)
out<-rcc(times,status,group,rho,lambda)
out$call <- call
out$n = table(group)
names(out$n)<-paste(group.name,"=",names(out$n),sep="")
out$data.name <- paste("Data:",paste("{", L.name, ",", R.name, "}", " by ", group.name, sep = ""))
dif <- t(out$obs-out$exp)
ug <- sort(unique(group))
k <- length(ug)
if ((is.numeric(group))&(k>2)) {
out$information <- paste("Trend FH test for right-censored data",sep = "")
out$var <- c(t(ug)%*%out$var%*%ug)
out$statistic <- c((dif%*%ug)/sqrt(out$var))
if (alternative == "increasing") {
out$pvalue <- pnorm(out$statistic)
out$alt.phrase <- paste("Alternative hypothesis: increasing survival functions (higher ", group.name ," implies later event times)", sep = "")
} else if (alternative == "decreasing") {
out$pvalue <- 1-pnorm(out$statistic)
out$alt.phrase <- paste("Alternative hypothesis: decreasing survival functions (higher ", group.name, " implies earlier event times)", sep = "")
} else {
out$pvalue <- 2-2*pnorm(abs(out$statistic))
out$alt.phrase <- paste("Alternative hypothesis: survival functions not equal", sep = "")
}
names(out$statistic) <- "Z"
} else if (!(is.numeric(group))&(k>2)) {
out$information <- paste("K-sample test for right-censored data",sep = "")
out$statistic= c(dif%*%ginv(out$var)%*%t(dif))
if (alternative!="different") warning("alternative ignored, group is factor with more than 2 groups")
out$pvalue <- 1 - pchisq(out$statistic,k-1)
out$alt.phrase <- paste("Alternative hypothesis: survival functions not equal")
names(out$statistic) <- "Chi Square"
} else {
out$var <- out$var[1,1]
out$statistic <- dif[2]/sqrt(out$var)
out$information <- paste("Two-sample test for right-censored data",sep = "")
if (alternative == "increasing") {
out$pvalue <- pnorm(out$statistic)
out$alt.phrase <- paste("Alternative hypothesis: increasing survival functions (", names(out$n)[2] ," has later event times)", sep = "")
} else if (alternative == "decreasing") {
out$pvalue <- 1-pnorm(out$statistic)
out$alt.phrase <- paste("Alternative hypothesis: decreasing survival functions (", names(out$n)[2] ," has earlier event times)", sep = "")
} else{
out$pvalue <- 2-2*pnorm(abs(out$statistic))
out$alt.phrase <- paste("Alternative hypothesis: survival functions not equal", sep = "")
}
names(out$statistic) <- "Z"
}
out$information <- paste("\t",out$information,"\n\nParameters: rho=",as.character(rho), ", lambda=",as.character(lambda),"\nDistribution: counting process approach",sep = "")
class(out)<-"FHtestrcc"
out
}
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