Nothing
#cor.fk <- function (x, y = NULL, cor = TRUE) #corissue
cor.fk <- function (x, y = NULL)
{
cor = TRUE #corissue
if (is.null (y))
{ ## x is expected to be matrix or data frame
if (!is.matrix (x) && ! is.data.frame (x))
stop ("x must be either numeric vector, matrix or data.frame.")
{
p <- ncol (x)
dn <- colnames (x)
ret <- diag (p)
dimnames (ret) <- list (dn, dn)
for (i in 1:p)
{
if (!cor) ## calculating the diagonal elements. if cor == TRUE the diagonal elements are all equal to 1 and hence don't need to be calculated
# ret[i, i] <- cor.fk (x[, i], x[, i], cor = cor)
ret[i, i] <- cor.fk (x[, i], x[, i]) #corissue
if (i == p)
return (ret)
ord <- order (x[, i])
cur.x <- x[ord, i]
for (j in (i+1):p)
ret[i, j] <- ret[j, i] <- .cor.fk.2d (cur.x, x[ord,j], cor)
}
}
}
else
{
if (length (x) != length (y))
stop ("x and y must have same length.")
ord <- order (x)
return (.cor.fk.2d (x[ord], y[ord], cor))
}
}
.cor.fk.2d <- function (x, y, cor)
{
if (length (x) != length (y))
stop ("x and y must have same length.")
ret <- .C (C_kendallNlogN, NAOK = FALSE, DUP = TRUE, ## 20130322 set DUP = TRUE - C_kendallNlogN implementation modifies x & y vectors!!
as.double (x),
as.double (y),
as.integer (c (length (x), cor)),
ret = double (1))
return (ret$ret)
}
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