From gnw3@acm.org  Sun Oct 29 13:48:10 2000
From: gnw3@acm.org (gnw3@acm.org)
Date: Sun, 29 Oct 2000 14:48:10 +0100 (MET)
Subject: [Rd] median(c(NA,NA),na.rm=T) fails (PR#713)
Message-ID: <200010291348.OAA22944@pubhealth.ku.dk>

Full_Name: George N. White III
Version: 1.1.1
OS: Linux
Submission from: (NULL) (192.75.95.37)


Calling median(c(NA,NA), ns.rm=T) passes a "null" vector to sort.  I would
expect it to return "NA", as suggested below:

> median
function (x, na.rm = FALSE) 
{
    if (na.rm) 
        x <- x[!is.na(x)]
    else if (any(is.na(x))) 
        return(NA)
    n <- length(x)
    if (n == 0) return(NA)  ################ suggested fix
    half <- (n + 1)/2
    if (n%%2 == 1) {
        sort(x, partial = half)[half]
    }
    else {
        sum(sort(x, partial = c(half, half + 1))[c(half, half + 
            1)])/2
    }
}


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[Rd] median(c(NA,NA),na.rm=T) fails (PR#713)
gnw3@acm.org