function varargout=plane3(arg1,arg2)% PLANE3 Plots plane in 3d.%% Synopsis:%  h=plane3( W, b )%  h=plane3( model )%% Description:%  h=plane3( W, b ) plots the plane described as%     W'*x + b = 0.%%  h=plane3( model ) structure model contains plane %   parametres W and b.%% Output:%  h [1 x nobjects] Handles of used graphical objects.%% About: Statistical Pattern Recognition Toolbox% (C) 1999-2003, Written by Vojtech Franc and Vaclav Hlavac% <a href="http://www.cvut.cz">Czech Technical University Prague</a>% <a href="http://www.feld.cvut.cz">Faculty of Electrical Engineering</a>% <a href="http://cmp.felk.cvut.cz">Center for Machine Perception</a>% Modifications:% 17-may-2004, VF% 13-apr-2003, VF% 11-aug-2003, VFif isstruct(arg1),  W = arg1.W;  b = arg1.b;  if nargin >= 2, col = arg2; else col = 'g'; endelse  W = arg1;  b = arg2;  if nargin >= 3, col = arg3; else col = 'g'; endendax=axis;A=[ax(1) ax(3)];B=[ax(2) ax(3)];C=[ax(2) ax(4)];D=[ax(1) ax(4)];W=W(:);A=[A, -(b + A*W(1:2))/W(3)];B=[B, -(b + B*W(1:2))/W(3)];C=[C, -(b + C*W(1:2))/W(3)];D=[D, -(b + D*W(1:2))/W(3)];  X=[A(1) B(1) C(1) D(1)];Y=[A(2) B(2) C(2) D(2)];Z=[A(3) B(3) C(3) D(3)];h=patch(X,Y,Z,col);set(h,'faceAlpha',0.5);if nargout >= 1, varargout{1} = h; endreturn;% EOF