@max_key(nim)
x_n of the last breakpoint of the nim.  This
coordinate is the sum of x_0 (the coordinate of the first breakpoint
of the nim, and of all intervals d_i of the breakpoints i. If the
nim is vectorial, x_n is a tab. 
See also @min_key, @min_val and @max_val.
 
See also Nim Related Functions @aggregate, @align_breakpoints, @dim, @filter_max_t, @filter_median_t, @filter_min_t, @integrate, @linearize, @max_key, @max_val, @min, @min_key, @min_val, @projection, @push_back, @push_front, @sample, @simplify_lang_v, @simplify_radial_distance_t, @simplify_radial_distance_v, @window_filter_t