function pdemodel

% Copyright (c) 1994-98 by The MathWorks, Inc.
% $Revision: 1.8 $

[pde_fig,ax]=pdeinit;
pdetool('appl_cb',1);
set(ax,'DataAspectRatio',[1 1 1])
set(ax,'PlotBoxAspectRatio',[1.5 1 1])
set(ax,'XLim',[-4.5 4.5]);
set(ax,'YLim',[-3 3]);
set(ax,'XTickMode','auto');
set(ax,'YTickMode','auto');

% Geometry description:
% $Revision: 1.8 $
pdepoly([ -3,...
 -3,...
 -1,...
 -1,...
 1,...
 3,...
 1,...
 1,...
],...
[ 1,...
 -1,...
 -3,...
 -1,...
 -1,...
 1,...
 3,...
 1,...
],...
 'P1');
set(findobj(get(pde_fig,'Children'),'Tag','PDEEval'),'String','P1')

% Boundary conditions:
pdetool('changemode',0)
pdesetbd(8,...
'dir',...
1,...
'1',...
'0')
pdesetbd(7,...
'dir',...
1,...
'1',...
'0')
pdesetbd(6,...
'dir',...
1,...
'1',...
'0')
pdesetbd(5,...
'dir',...
1,...
'1',...
'0')
pdesetbd(4,...
'dir',...
1,...
'1',...
'0')
pdesetbd(3,...
'dir',...
1,...
'1',...
'0')
pdesetbd(2,...
'dir',...
1,...
'1',...
'0')
pdesetbd(1,...
'dir',...
1,...
'1',...
'0')

% Mesh generation:
setuprop(pde_fig,'Hgrad',1.3);
setuprop(pde_fig,'refinemethod','regular');
pdetool('initmesh')
pdetool('refine')
pdetool('jiggle')

% PDE coefficients:
pdeseteq(4,...
'1.0',...
'0.0',...
'10.0',...
'1.0',...
'0:10',...
'0.0',...
'0.0',...
'[0 10]')
setuprop(pde_fig,'currparam',...
['1.0 ';...
'0.0 ';...
'10.0';...
'1.0 '])

% Solve parameters:
setuprop(pde_fig,'solveparam',...
str2mat('0','1000','10','pdeadworst',...
'0.5','longest','0','1E-4','','fixed','Inf'))

% Plotflags and user data strings:
setuprop(pde_fig,'plotflags',[1 1 1 1 1 1 7 1 0 0 0 1 1 1 0 0 0 1]);
setuprop(pde_fig,'colstring','');
setuprop(pde_fig,'arrowstring','');
setuprop(pde_fig,'deformstring','');
setuprop(pde_fig,'heightstring','');

% Solve PDE:
pdetool('solve')

