The layout engine will readjust the size of the page according with the positions of the nodes, so, if you are going to set the positions of the nodes yourself, you just need to use a similar scale to the one it is initially provided, for example:
% I create a random graph with 28 nodes:
bg = biograph(28);
% Display it in the GUI and get a handle
% back to work with it (this will use by default
% the hierarchical layout):
hbg = view(bg);
% Get an idea of what are the actual extents of
% the page in the GUI by looking at all the current
% node positions:
page_Size = max(cell2mat(arrayfun(@(x) get(x,'Position'),...
get(hbg,'Nodes'),'Uniform',false)))
% Place the nodes in a circular layout, in my graph
% page_size was around [1000,1000], so I will select a
% center at [500 500] and a radius of 300, this will keep
% the layout approximately in the same scale and I will
% not have to manually change the size of the nodes or
% the fonts:
radius = 300;
center = [500 500];
for i = 1:28
set(hbg.Nodes(i),'Position',...
[center(1)+radius.*sin((i*2*pi/28)),...
center(2)+radius.*cos((i*2*pi/28))])
end
% Now I can use dolayout:
dolayout(hbg,'pathsOnly',true)
HTH Lucio
