+
Finding the coordinates for every dimension of matrix that
correspond to the 'global' coordinate w, as retrieved from 'where'.
IN: matrix - fltarr Any number of dimensions.
w - float 'global' coordinate, as provided by
where.
OUT: coor - intarr Coordinates of the point identified by
the 'global' coordinate w. This vector
has many elements as dimensions of
matrix.
C. Allende Prieto, UT, May 1999