function pdemodel
[pde_fig,ax]=pdeinit;
pdetool('appl_cb',1);
pdetool('snapon','on');
set(ax,'DataAspectRatio',[1 1 1]);
set(ax,'PlotBoxAspectRatio',[1.5 1 1]);
set(ax,'XLim',[-1.5 1.5]);
set(ax,'YLim',[-1 1]);
set(ax,'XTick',[ -1.5,...
 -1,...
 -0.5,...
 -0.050000000000000003,...
 0,...
 0.050000000000000003,...
 0.5,...
 1,...
 1.5,...
]);
set(ax,'YTickMode','auto');
setappdata(ax,'extraspacex','-0.05 0.05');
pdetool('gridon','on');

% Geometry description:
pderect([-0.5 0.5 0.60000000000000009 -0.59999999999999998],'R1');
pderect([-0.050000000000000003 0.050000000000000003 0.40000000000000013 -0.39999999999999991],'R2');
set(findobj(get(pde_fig,'Children'),'Tag','PDEEval'),'String','R1-R2')

% Boundary conditions:
pdetool('changemode',0)
pdesetbd(8,...
'neu',...
1,...
'0',...
'0')
pdesetbd(7,...
'neu',...
1,...
'0',...
'0')
pdesetbd(6,...
'dir',...
1,...
'1',...
'10')
pdesetbd(5,...
'neu',...
1,...
'0',...
'0')
pdesetbd(4,...
'neu',...
1,...
'0',...
'0')
pdesetbd(3,...
'neu',...
1,...
'0',...
'0')
pdesetbd(2,...
'neu',...
1,...
'0',...
'0')
pdesetbd(1,...
'neu',...
1,...
'0',...
'0')

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

% PDE coefficients:
pdeseteq(2,...
'1.0',...
'0.0',...
'0',...
'1.0',...
'0:0.1:1',...
'0.0',...
'0.0',...
'[0 100]')
setappdata(pde_fig,'currparam',...
['1.0';...
'0.0';...
'0  ';...
'1.0'])

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

% Plotflags and user data strings:
setappdata(pde_fig,'plotflags',[1 1 1 1 1 1 1 1 0 0 0 11 1 0 0 0 0 1]);
setappdata(pde_fig,'colstring','');
setappdata(pde_fig,'arrowstring','');
setappdata(pde_fig,'deformstring','');
setappdata(pde_fig,'heightstring','');

% Solve PDE:
pdetool('solve')