The package provides tools to (1) visualize multivariate density functions
and density estimates with level set trees, (2) visualize level sets with
shape trees, (3) visualize multivariate data with tail trees, (4)
visualize scales of multivariate density estimates with mode graphs and
branching maps, and (5) visualize anisotropic spread with 2D volume
functions and 2D probability conetent functions. Level set trees visualize
mode structure, shape trees visualize shapes of level sets of unimodal
densities, and tail trees visualize connected data sets. The kernel
estimator is implemented but the package may be applied for visualizing
other density
estimates.