[R] checking bivariate normality

[David Winsemius]

On Apr 6, 2010, at 7:48 AM, arindam fadikar wrote:

> x <- iris$Sepal.Length[1:50]/iris$Sepal.Width[1:50]
> y <- iris$Petal.Length[1:50]/iris$Petal.Width[1:50]
>
> I want to check whether (x,y) follows a bivariate normal  
> distribution or
> not,  using density plot or scatter plot. Is it possible to plot a  
> bivariate
> density in R. I cant find any.

wireframe and package functions for mv-normal distribution?

>
>

require(MASS)
?kde2d

OR

??kde which on my machine pulls up quite a 2 alternatives in my  
collection of installed packages: ade4::s.kde2d, KernSmooth::bkde2D,  
and maybe ks::kde.

>
> Arindam Fadikar
> M.Stat
> Indian Statistical Institute.
> New Delhi, India
-- 

David Winsemius, MD
West Hartford, CT