[R] gaoshan

[Mike Miller]

On Fri, 24 Jun 2011, wang peter wrote:

> aa file is：
> x  1 NA  2
> y  1 NA  3
>
> and r program is
>> aa<-read.table("aa",row.names=1)
>> bb<-cor(t(aa),method = "pearson",use="pairwise.complete.obs")
>> bb
>  x y
> x 1 1
> y 1 1
>
> i am confused why the pearson correlation coefficients between x and y is 1


You have two paired observations.  Plot the points and draw the regression 
line.  Every point is on the line (there are only two points).  The 
correlation has to be 1.

Mike