function v = FE(f,n)% FE(f,n): return basis element n of frame f%%See also gable.% GABLE, Copyright (c) 1999, University of Amsterdam% Copying, use and development for non-commercial purposes permitted.%          All rights for commercial use reserved; for more information%          contact Leo Dorst (leo@wins.uva.nl).%%          This software is unsupported.m = inv(f.m(2:4,2:4));if nargin ~= 2  error('FE takes two arguments');else  v = GA([0;m(1:3,n);0;0;0;0]);end