  The condvis package is for interactive visualization of sections in data
space, showing fitted models on the section, and observed data near the
section. The primary goal is the interpretation of complex models, and showing
how the observed data support the fitted model. There is a video accompaniment
to this paper available at https://www.youtube.com/watch?v=rKFq7xwgdX0. This is
a preprint version of an article to appear in the Journal of Statistical
Software.
