Integrates over the unit square.
integrate2d(fun, error = 1.0e-5, ...)integrate2d
returns a list with the $value of the integral over the
unit square [0,1]^2, an $error estimate and the number
of grid $points used by the integration function.
the function to be integrated. The first argument requests the x values, the second the y values, and the remaining are reserved for additional parameters. The integration is over the unit square "[0,1]^2".
the error bound to be achieved by the integration formula. A numeric value.
parameters passed to the function to be integrated.
W.N. Venables and B.D. Ripley for the underlying kde2d function,
Gregory R. Warnes for the underlying hist2d function,
Diethelm Wuertz for the Rmetrics R-port.
Azzalini A., (2004); The sn Package; R Reference Guide available from www.r-project.org.
Venables W.N., Ripley B.D., (2002); Modern Applied Statistics with S, Fourth Edition, Springer.
Warnes G.R., (2004); The gregmisc Package; R Reference Guide available from www.r-project.org.