内容简介作者简介 - 科学与工程计算系

9.7.2 任意布置子图和轴外注释
【例 9.7.2-1】本例演示:axes 轴位框设计、rectangle 的运用、及轴外注释。所谓轴外注释,
实际上是使用了两个轴位框。一个轴位框充满全部图形窗,其坐标框被隐去,而只写注释文
字。而另一个比较小的轴位框用于绘图。这样从外表看去,注释就处于那小轴位框的外部。
clf
%
zeta2=[0.2 0.4 0.6 0.8 1.0];n=length(zeta2);
for k=1:n;Num{k,1}=1;Den{k,1}=[1 2*zeta2(k) 1];end
S=tf(Num,Den);
t=(0:0.4:20)';
[Y,x]=step(S,t);
tt=t*ones(size(zeta2));
%
clf reset,H=axes('Position', [0, 0, 1, 1], 'Visible', 'off');
%
str{1}='\fontname{隶书}二阶系统阶跃响应'; %
str{2}='y(t) = 1 - \beta^{-1}e^{-\zetat}sin(\betat + \theta)';
str{3}=' ';str{4}='\fontname{隶书}其中:';
str{5}='\beta = (1 - \zeta^{2})^{0.5}';
str{6}='\theta = arctg(\beta/\zeta)';
str{7}='\zeta = .2, .4, .6, .8, 1'; %
%
set(gcf, 'CurrentAxes',H) %
text(0.01, 0.73, str, 'FontSize', 12) %
h1=axes('Position', [0.45, 0.45, 0.5, 0.5]);
ribbon(tt,Y,0.4)
%
set(h1,'XTickLabelMode','manual','XTickLabel','0|0.4|0.8|1.2');%
set(h1,'ZTickLabel','0|1.0|2.0'); %
%
set(get(h1,'XLabel'),'String','\zeta \rightarrow','Rotation',17.5)
set(get(h1,'YLabel'),'String','\leftarrow t','Rotation',-25) %
set(get(h1,'Zlabel'),'String','y \rightarrow')
h2=axes('Position',[0.03, 0.08, 0.27, 0.27]);%
plot(tt,Y) %
%
h3=axes('Position',[0.37,0.04,0.63,0.32]); %
set(h3,'Xlim',[0,1.2],'Ylim',[0,0.5]) %
set(h3,'DataAspectRatio',[1 1 1]) %
set(h3,'ColorOrder',[0,0,0]) %
set(h3,'Visible','off') %
hh1=rectangle('Position',[0.5,0.2,0.4,0.2],'Curvature',[0,0]);
%
hh2=rectangle('Position',[0.2,0.26,0.08,0.08],'Curvature',[1,1]);
%
xx1=0.05:0.01:0.2;xx2=0.28:0.02:0.5;
xx3=0.9:0.02:1.1;xx4=0.24:0.02:1;
yy5=0.1:0.02:0.26;yy6=0.1:0.02:0.3;
yy1=0.3*ones(size(xx1));yy2=0.3*ones(size(xx2));
yy3=0.3*ones(size(xx3));yy4=0.1*ones(size(xx4));
xx5=0.24*ones(size(yy5));xx6=ones(size(yy6));
line(xx1,yy1);line(xx2,yy2);line(xx3,yy3);line(xx4,yy4);
line(xx5,yy5);line(xx6,yy6)
line(0.17,0.3,'Marker','>','MarkerFaceColor','k')
line(0.47,0.3,'Marker','>','MarkerFaceColor','k')
line(1.1,0.3,'Marker','>','MarkerFaceColor','k')
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