function NDDModelInterconnections_aux
% Draws blocks for connecting models example

clf;
ax = gca;
axis(ax,'normal');
set(ax,'visible','off','xlim',[-2 22],'ylim',[0.3 10.7])
y0 = 5;  x0 = 0;
wire('parent',ax,'x',x0+[0 3],'y',y0+[0 0],'arrow',0.5);
wire('parent',ax,'x',x0+[0 3],'y',y0+[2 2],'arrow',0.5);
wire('parent',ax,'x',x0+[0 3],'y',y0+[-2 -2],'arrow',0.5);
sysblock('parent',ax,'position',[x0+3 y0-3 3 6],'name','G',...
    'fontsize',12+0*isunix,'fontweight','bold','facecolor',[1 1 .9]);
sysblock('parent',ax,'position',[x0+10 y0+3-2 5 4],'name','Fa','num','s+1','den','s^2+2s+5',...
    'fontsize',12+0*isunix,'fontweight','bold','facecolor',[1 1 .9]);
sysblock('parent',ax,'position',[x0+10 y0-3-2 5 4],'name','Fb','num','s+2','den','s^2+3s+7',...
    'fontsize',12+0*isunix,'fontweight','bold','facecolor',[1 1 .9]);
wire('parent',ax,'x',x0+[6 8 8 10],'y',y0+[0 0 3 3],'arrow',0.5);
wire('parent',ax,'x',x0+[6 8 8 10],'y',y0+[0 0 -3 -3],'arrow',0.5);
wire('parent',ax,'x',x0+[15 18],'y',y0+[3 3],'arrow',0.5);
wire('parent',ax,'x',x0+[15 18],'y',y0+[-3 -3],'arrow',0.5);