function?facedemo?（?n?）

%*****************************************************************************80
%
%?FACEDEMO:?Example?polygonal?geometries?for?MESHFACES.
%
%??Author:
%
%????Darren?Engwirda
%
??if?（?nargin?????fprintf?（?1?‘\n‘?）;
????fprintf?（?1?‘The?usual?call?is?to?FACEDEMO?（?N?）?with?N?=?1?or?2.\n‘?）;
????fprintf?（?1?‘??Since?N?was?not?specified?the?value?1?will?be?chosen.\n‘?）;
????n?=?1;
??end

??switch?n

????case?1

??????node?=?[0.0?0.0;?1.00.0;?1.01.0;?0.01.0;?1.010.0;?1.011.0;?3.00.0;?3.01.0];
??????edge?=?[12;?23;?34;?41;?25;?56;?63;?57;?78;?86];
??????face{1}?=?[1234];
??????f