function pdemodel
[pde_fig,ax]=pdeinit;
pdetool('appl_cb',1);
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,'XTickMode','auto');
set(ax,'YTickMode','auto');
pdetool('gridon','on');

% Geometry description:
pderect([-1.3481963927855714 1.399298597194389 0.88827655310621267 -0.90330661322645245],'R1');
pderect([-0.63877755511022083 -0.50951903807615273 0.88827655310621267 -0.6237474949899795],'R2');
pderect([1.1888777555110224 1.4143286573146296 0.90330661322645334 0.834168336673347],'R3');
pderect([-1.1227454909819639 -1.4053106212424851 0.67184368737474998 0.93036072144288617],'R4');
set(findobj(get(pde_fig,'Children'),'Tag','PDEEval'),'String','R1-R2-R3-R4')

% Boundary conditions:
pdetool('changemode',0)
pdesetbd(12,...
'neu',...
1,...
'0',...
'0')
pdesetbd(11,...
'neu',...
1,...
'0',...
'0')
pdesetbd(10,...
'dir',...
1,...
'1',...
'100')
pdesetbd(9,...
'dir',...
1,...
'1',...
'100')
pdesetbd(8,...
'dir',...
1,...
'1',...
'0')
pdesetbd(7,...
'dir',...
1,...
'1',...
'0')
pdesetbd(6,...
'neu',...
1,...
'0',...
'0')
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')
pdetool('refine')
pdetool('refine')

% PDE coefficients:
pdeseteq(2,...
'1.0',...
'0.0',...
'0',...
'1.0',...
'0:10',...
'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','7296','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 2 1 1 1 1 11 1 1 1 0 0 1]);
setappdata(pde_fig,'colstring','');
setappdata(pde_fig,'arrowstring','');
setappdata(pde_fig,'deformstring','');
setappdata(pde_fig,'heightstring','');

% Solve PDE:
pdetool('solve')
