ch6 matlab图形句柄.ppt

Matlab图形句柄UIControls桌面对象Matlab图形句柄3、图形对象属性t=0:0.1:4*pi;
y=exp(-t/5).*sin(t);
h=plot(t,y);%h为曲线的句柄
set(h,'Linewidth',3);%将曲线宽度改为3
set(h,'Marker','o');%将曲线的线标改成小圆圈
set(h,'MarkerSize',20);%将线标的大小改成20x=0:pi/20:2*pi;y=sin(x);z=cos(x);
plot(x,y,'r',x,z,'g');
h=findobj(gca,'color',[1,0,0]);
pause
set(h,'color',[0,0,1],'linewidth',3);
pause
delete(h)Matlab图形句柄Matlab图形句柄Matlab图形句柄4、图形对象的创建MATLAB为每个图形窗口提供了很多属性。这些属性及其取值控制着图形窗口对象。除公共属性外，其他常用属性有：5）Position属性：取值形式为：[xmin,ymin,w,h]确定窗口位置和大小。例：编写程序建立图形窗口，要求满足：x=0:0.05:2*pi;y=sin(x);
h1=figure('units','normalized','color',[1,0,1],'position',…
[0.4,0.25,0.5,0.5],'name','图形窗口演示','numbertitle',...
'off','menubar','none','windowbuttondownfcn',...
'plot(x,y);axis([0,2*pi,-1,1])','keypressfcn','closeall');x=linspace(0,2*pi,60);
y=sin(x);
z=cos(x);
t=tan(x);
ct=1./(t+eps);
%命令组待用
C4=['figure(''Name'',''cotangent(x)'',''NumberTitle'',',...
'''off'');plot(x,ct);axis([0,2*pi,-40,40]);'];
C3=['figure(''Name'',''tangent(x)'',''DeleteFcn'',C4,',...
'''NumberTitle'',''off'');plot(x,t);axis([0,2*pi,-40,40]);'];
C2=['figure(''Name'',''cos(x)'',''DeleteFcn'',C3,',...
'''NumberTitle'',''off'');plot(x,z);axis([0,2*pi,-1,1]);'];
%先创建1个图形窗口并绘制曲线
figure('Name','sin(x)','DeleteFcn',C2,'NumberTitle','off');
plot(x,y);axis([0,2*pi,-1,1]);2.坐标轴对象例4.27利用坐标轴对象实现图形窗口的任意分割。
程序如下8）XScale,YScale,ZScale属性：取值都是linear(缺省)或log，其定义了个坐标刻度的类型。8）View属性：取值为两个元素，其定义了视点的方向。3.曲线对象例：同一坐标系可生成多个坐标轴x2=(1:0.1:2*pi)*3;
y2=cos(x2);
hl1=line(x1,y1,'color','r');
gridon
ax1=gca;
set(ax1,'Xcolor','r','Ycolor','r')
xm=get(ax1,'Xlim');
ym=get(ax1,'Ylim');
xi=(xm(2)-xm(1))/6;
yi=(ym(2)-ym(1))/10;
set(ax1,'XTick',[xm(1):xi:xm(2)]);
set(ax1,'yTick',[ym(1):yi:ym(2)]);ax2=axes('position',get(ax1,'position'));
set(ax2,'Xcolor','b','Ycolor','b')
set(ax2,'XaxisLocation','top')
set(ax2,'yaxisLocation','right','color','none')
hl2=line(x2,y2,'color','k','Parent',ax2);
xn=get(ax2,'Xlim');
yn=get(ax2,'Ylim');
xj=(xn(2)-xn(1))/6;
yj=(yn(2)-yn(1))/10;
set(ax2,'XTick',[xn(1):xj:xn(2)]);
set(ax2,'yTick',[