def section_radial_distance(section, origin):
return mm.point_dist(section.points[-<NUM_LIT:1>], origin)<EOL>
Return the radial distances of a tree section to a given origin point

    The radial distance is the euclidian distance between the
    end-point point of the section and the origin point in question.

    Parameters:
        section: neurite section object
        origin: point to which distances are measured. It must have at least 3\
            components. The first 3 components are (x, y, z).