Nothing
`SRCov` <- function(X, location=NULL, na.action=na.fail)
{
X<-na.action(X)
X<-as.matrix(X)
if(is.function(location)) location<-location(X)
if(is.null(location)) location<-hl.location(X)
X<-sweep(X, 2, location)
R<-as.matrix(signranks(X))
t(R)%*%R/dim(R)[1]
}
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