function pdemodel
[pde_fig,ax]=pdeinit;
pdetool('appl_cb',5);
set(ax,'DataAspectRatio',[1 1 1]);
set(ax,'PlotBoxAspectRatio',[3 2 1]);
set(ax,'XLim',[-1.5 1.5]);
set(ax,'YLim',[-1 1]);
set(ax,'XTickMode','auto');
set(ax,'YTickMode','auto');

% Geometry description:
pderect([-1.4654308617234473 1.4594188376753512 0.96643286573146314 -0.98146292585170292],'R1');
pderect([-0.18787575150300628 -0.14579158316633301 0.46743486973947945 -0.50050100200400771],'R2');
set(findobj(get(pde_fig,'Children'),'Tag','PDEEval'),'String','R1-R2')

% Boundary conditions:
pdetool('changemode',0)
pdesetbd(8,...
'dir',...
1,...
'1',...
'100')
pdesetbd(7,...
'dir',...
1,...
'1',...
'0')
pdesetbd(6,...
'dir',...
1,...
'1',...
'0')
pdesetbd(5,...
'dir',...
1,...
'1',...
'100')
pdesetbd(4,...
'dir',...
1,...
'1',...
'100')
pdesetbd(3,...
'dir',...
1,...
'1',...
'100')
pdesetbd(2,...
'dir',...
1,...
'1',...
'0')
pdesetbd(1,...
'dir',...
1,...
'1',...
'0')

% Mesh generation:
setappdata(pde_fig,'Hgrad',1.3);
setappdata(pde_fig,'refinemethod','regular');
setappdata(pde_fig,'jiggle',char('on','mean',''));
pdetool('initmesh')
pdetool('refine')

% PDE coefficients:
pdeseteq(1,...
'1.0',...
'0.0',...
'1.0',...
'1.0',...
'0:10',...
'0.0',...
'0.0',...
'[0 100]')
setappdata(pde_fig,'currparam',...
['1.0';...
'1.0'])

% Solve parameters:
setappdata(pde_fig,'solveparam',...
str2mat('0','3510','10','pdeadworst',...
'0.5','longest','0','1E-4','','fixed','Inf'))

% Plotflags and user data strings:
setappdata(pde_fig,'plotflags',[2 1 2 1 1 1 1 1 0 0 0 1 0 0 1 0 0 1]);
setappdata(pde_fig,'colstring','');
setappdata(pde_fig,'arrowstring','');
setappdata(pde_fig,'deformstring','');
setappdata(pde_fig,'heightstring','');

% Solve PDE:
pdetool('solve')
