Bivariate Ripley K function

Hello,
I have used the univariate Ripley K function in R, but does anyone know if 
there is a bivariate function built in? I have two species that I am dealing 
with.
Also, how might I add error bars into the graphs (univariate and/or 
bivariate)?

Thank you,

Karin Leiderman
k_leiderman at hotmail.com
Graduate Student/Research Assistant
Department of Mathematics
Univesity of New Mexico

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