Nothing

```
matchFactor <- function(u,s, type = "dot") {
s2u <- sum(u^2)
s2s <- sum(s^2)
if(s2u == 0 || s2s == 0)
ret <- if( s2u == 0 && s2s == 0) 1 else 0
else {
if(type=="euclid")
ret <- 1/ ( 1+sum( ( (u/sqrt(s2u)) - (s/sqrt(s2s)))^2 ))
if(type=="dot")
ret <- (u%*%s)/(sqrt(s2u)*sqrt(s2s))
}
ret
}
```

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