On Fri, Aug 19, 2011 at 11:50 AM, Liviu Andronic <landronim...@gmail.com> wrote:
> Dear all
> Is there an easy way to display only one half (top-right or
> bottom-left) of a correlation matrix?
>
>> require(Hmisc)
>> rcorr(as.matrix(mtcars[ , 1:4]))
> mpg cyl disp hp
> mpg 1.00 -0.85 -0.85 -0.78
> cyl -0.85 1.00 0.90 0.83
> disp -0.85 0.90 1.00 0.79
> hp -0.78 0.83 0.79 1.00
>
Use as.dist: here's an example.
> x = matrix(rnorm(5*100), 100, 5)
> as.dist(cor(x))
1 2 3 4
2 -2.892981e-06
3 2.873711e-02 1.002969e-02
4 -5.803705e-02 4.022733e-02 -6.154211e-02
5 1.137083e-01 -8.065676e-02 -9.279316e-02 -8.201583e-02
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