search for: hyperrectangl

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2007 Jul 10
2
integration over a simplex
Hello The excellent adapt package integrates over multi-dimensional hypercubes. I want to integrate over a multidimensional simplex. Has anyone implemented such a thing in R? I can transform an n-simplex to a hyperrectangle but the Jacobian is a rapidly-varying (and very lopsided) function and this is making adapt() slow. [ A \dfn{simplex} is an n-dimensional analogue of a triangle or tetrahedron. It is the convex hull of (n+1) points in an n-dimensional Euclidean space. My application is a variant of the Diric...