针对已经绘制好的figure，如何修改曲线的属性，如颜色、线性、标记符号？

思路：首先选中目标属性，调用句柄来逐级选择，即 figure – axis – line ；

具体程序如下：

set(0,'defaultfigurecolor','w');%设置图片默认背景为白色
h_f=gcf;%选中当前图片句柄
h_a=gca;%选中坐标轴句柄
h_lines=get(h_a,'Children');%选中曲线句柄
set(h_lines(1,1),'LineStyle','-.','Color',[0 0 1],'LineWidth',1.5,'Marker','o','MarkerSize',10.0,'MarkerFaceColor','none','MarkerEdgeColor',[0 0 1],'MarkerIndices',1:5:500);%设置曲线3的属性
set(h_lines(2,1),'LineStyle','-','Color',[25 141 25]/255,'LineWidth',1.5,'Marker','^','MarkerSize',10.0,'MarkerFaceColor','none','MarkerEdgeColor',[25 141 25]/255,'MarkerIndices',1:5:500);%设置曲线2的属性
set(h_lines(3,1),'LineStyle','--','Color',[1 0 0],'LineWidth',1.5,'Marker','p','MarkerSize',10.0,'MarkerFaceColor','none','MarkerEdgeColor',[1 0 0],'MarkerIndices',1:5:500);%设置曲线1的属性
set(gca,'XTick',0:500:2000,'YTick',0:0.2:1,'FontSize',28,'FontName','Arial');%设置坐标轴取值范围
xlabel('Time (units of \tau)','FontName','Euclid','FontSize',36,'FontWeight','Bold');%设置x轴标签
ylabel('Intensity {\itf} ^2 ({\ita}. {\itu}.)','FontName','Euclid','FontSize',36,'FontWeight','Bold');%设置y轴标签
axis([0 2000 -0.05 1.05]);%设置坐标轴取值范围
lgd1=legend({'\Omega_{\itp}','\Omega_{\itc}/\Omega_{0}','\theta'},'Location','Northeast','FontSize',28,'FontName','Euclid','TextColor','black');%设置图例
legend('boxon');%设置图例边框-打开
grid on;%打开网格线