function pdemodel
[pde_fig,ax]=pdeinit;
pdetool('appl_cb',1);
pdetool('snapon','on');
set(ax,'DataAspectRatio',[1 1 1]);
set(ax,'PlotBoxAspectRatio',[819.20000000000005 546.13333333333333 136.53333333333333]);
set(ax,'XLimMode','auto');
set(ax,'YLim',[-2 2]);
set(ax,'XTickMode','auto');
set(ax,'YTickMode','auto');

% Geometry description:
pdecirc(0,0,2,'C1');
pdecirc(0,0,1,'C2');
pderect([0 2 -2 0],'SQ1');
pderect([0 -2 2 -2],'R1');
set(findobj(get(pde_fig,'Children'),'Tag','PDEEval'),'String','C1-C2-R1-SQ1')

% Boundary conditions:
pdetool('changemode',0)
pdesetbd(4,...
'dir',...
1,...
'1',...
'x.*y.^2')
pdesetbd(3,...
'neu',...
1,...
'y+y',...
'x')
pdesetbd(2,...
'dir',...
1,...
'1',...
'x.*y.^2')
pdesetbd(1,...
'dir',...
1,...
'1',...
'x.*y.^2')

% Mesh generation:
setuprop(pde_fig,'trisize',1);
setuprop(pde_fig,'Hgrad',1.3);
setuprop(pde_fig,'refinemethod','regular');
pdetool('initmesh')
pdetool('refine')

% PDE coefficients:
pdeseteq(1,...
'1.0',...
'2.0',...
'10.0',...
'1.0',...
'0:10',...
'0.0',...
'0.0',...
'[0 100]')
setuprop(pde_fig,'currparam',...
['1.0 ';...
'2.0 ';...
'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 2 1 1 1 1 6 1 0 1 0 1 1 0 1 0 0 1]);
setuprop(pde_fig,'colstring','');
setuprop(pde_fig,'arrowstring','');
setuprop(pde_fig,'deformstring','');
setuprop(pde_fig,'heightstring','');

% Solve PDE:
pdetool('solve')
