[R] How to draw the graph of f(x,y) = x * y ?

[Ben Bolker]

Paul Smith <phhs80 <at> gmail.com> writes:

> 
>
> The function curve() draws the graph of functions from R to R. Is
> there some homologous function to curve() to draw functions from R^2
> to R?
> >

  There is a curve3d function in the emdbook package on CRAN.