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');

% Geometry description:
pderect([-1.4323647294589181 1.4804609218436879 0.96042084168336705 -0.97845691382765487],'R1');
set(findobj(get(pde_fig,'Children'),'Tag','PDEEval'),'String','R1')

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

% PDE coefficients:
pdeseteq(3,...
'1.0',...
'0.0',...
'0.0',...
'1.0',...
'0:0.01:1',...
'heaviside(0.02-x.^2-y.^2)',...
'0.0',...
'[0 100]')
setappdata(pde_fig,'currparam',...
['1.0';...
'0.0';...
'0.0';...
'1.0'])

% Solve parameters:
setappdata(pde_fig,'solveparam',...
str2mat('0','22464','10','pdeadworst',...
'0.5','longest','0','1E-4','','fixed','Inf'))

% Plotflags and user data strings:
setappdata(pde_fig,'plotflags',[1 1 1 2 1 1 6 0 1 0 1 101 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')
