[R] programming advice
ronggui
ronggui.huang at gmail.com
Thu Jun 22 18:13:19 CEST 2006
Will the following code work for you?
> index<-!(x==0 & y==0)
> x<-x[index]
> y<-y[index]
2006/6/22, Fred JEAN <frederic.jean at univ-brest.fr>:
> Dear R users
>
> I want to compute Kendall's Tau between two vectors x and y.
> But x and y may have zeros in the same position(s) and I wrote the
> following function to be sure to drop out those "double zeros"
>
> "cor.kendall" <- function(x,y) {
> nox <- c()
> noy <- c()
> #
> for (i in 1:length(x)) if (x[i]!= 0 | y[i] != 0)
> nox[length(nox)+1]<- x[i]
> for (i in 1:length(y)) if (x[i]!= 0 | y[i] != 0)
> noy[length(noy)+1]<- y[i]
> #
> res.kendall <- cor.test(nox,noy,method = "kendall",exact=F)
> return(list(x=nox,y=noy,res.kendall,length(nox)))
> }
>
> Do you know a more elegant way to achieve the same goal ?
> (I'm sure you do : it's a newbie's program actually)
>
> --
> Fred
>
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--
»ÆÈÙ¹ó
Department of Sociology
Fudan University
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