clf reset
H=axes('unit','normalized','position',[0,0,1,1],'visible','off');
set(gcf,'currentaxes',H);
str='\fontname{隶书}归一化二阶系统的阶跃响应曲线';
text(0.12,0.93,str,'fontsize',13);
h_fig=get(H,'parent');
set(h_fig,'unit','normalized','position',[0.1,0.2,0.7,0.4]);

路过的

clf reset clear界面
H=axes('unit','normalized','position',[0,0,1,1],'visible','off');画和界面一样大的坐标轴,不可见
set(gcf,'currentaxes',H);把刚画的轴设定为当前界面的当前轴
str='\fontname{隶书}归一化二阶系统的阶跃响应曲线';
text(0.12,0.93,str,'fontsize',13);隶书文本
h_fig=get(H,'parent');得到轴的父句柄,即当前界面
set(h_fig,'unit','normalized','position',[0.1,0.2,0.7,0.4]);把界面到位置调整到相对与屏幕大小的左10%,高20%,宽70%,高%40位置

谢谢斑竹