PROCEDURE: mvn_swe_n3d PURPOSE: Determines density from a 3D distribution. Adapted from McFadden's n_3d.pro. AUTHOR: David L. Mitchell CALLING SEQUENCE: mvn_swe_n3d INPUTS: KEYWORDS: OUTPUTS: $LastChangedBy: dmitchell $ $LastChangedDate: 2014-10-31 14:15:03 -0700 (Fri, 31 Oct 2014) $ $LastChangedRevision: 16106 $ $URL: svn+ssh://thmsvn@ambrosia.ssl.berkeley.edu/repos/spdsoft/trunk/projects/maven/swea/mvn_swe_n3d.pro $