Matlab setting & snippet

h = figure;
plot(1:10);
set(h,'Units','Inches');
pos = get(h,'Position');
set(h,'PaperPositionMode','Auto','PaperUnits','Inches','PaperSize',[pos(3), pos(4)])
print(h,'filename','-dpdf','-r0')

function f(arg1, arg2, arg3)
if ~exist('arg2', 'var')
    arg2 = arg2Default;
end

hg1 = legend('第一条');
set(hg1,'FontSize',12,'Location', 'SouthOutside','box','off');  
%注：将legend放在图外面时，Legend 1不能通过鼠标移动，只能通过代码调整位置 
% ============= Legend 2 :
ah2 = axes('position',get(gca,'position'),'visible','off');
hg2 = legend(ah2, [p2 p3], '第二条', '第三条');
set(hg2,'FontSize',12,'Location', 'SouthOutside',...
        'Orientation','horizontal','box','off');

contour(u, v, z, [-0.5, -0.5], 'LineWidth', 2)