书籍：Matlab实用教程
工具：Matlab2021a
电脑信息：Intel® Xeon® CPU E5-2603 v3 @ 1.60GHz
系统类型：64位操作系统，基于X64的处理器 windows10 专业版
第4章 Matlab的符号计算计算的可视化和GUI设计
4.3 MATLAB的特殊图形绘制
4.3.1 条形图
>>x=3:6;>>y=[5.3130.45.111.8-1.73.78.10.61.57.7-4.5]y=5.300013.00000.40005.100011.8000-1.70003.70008.10000.60001.50007.7000-4.5000>>bar(x,y)>>x=3:6;>>y=[5.3130.45.111.8-1.73.78.10.61.57.7-4.5]y=5.300013.00000.40005.100011.8000-1.70003.70008.10000.60001.50007.7000-4.5000>>bar3(x,y)>>x=3:6;>>y=[5.3130.45.111.8-1.73.78.10.61.57.7-4.5]y=5.300013.00000.40005.100011.8000-1.70003.70008.10000.60001.50007.7000-4.5000>>barh(x,y)>>x=3:6;>>y=[5.3130.45.111.8-1.73.78.10.61.57.7-4.5]y=5.300013.00000.40005.100011.8000-1.70003.70008.10000.60001.50007.7000-4.5000>>bar3h(x,y)4.3.2 面积图和实心图
>>x=3:6;>>y=[5.3130.45.111.8-1.73.78.10.61.57.7-4.5]y=5.300013.00000.40005.100011.8000-1.70003.70008.10000.60001.50007.7000-4.5000>>area(x,y)>>x=3:6;>>y=[5.3130.45.111.8-1.73.78.10.61.57.7-4.5]y=5.300013.00000.40005.100011.8000-1.70003.70008.10000.60001.50007.7000-4.5000>>area(x,y)>>fill(x,y,'r')4.3.3 直方图
>>y=randn(10,2)y=0.5377-1.34991.83393.0349-2.25880.72540.8622-0.06310.31880.7147-1.3077-0.2050-0.4336-0.12410.34261.48973.57841.40902.76941.4172>>x=-2:0.5:2;>>hist(y,x)4.3.4 饼形图
>>y=[200100250400];>>explode=[0010];>>pie(y,explode,{'1','2','3','4'})>>y=[200100250400];>>explode=[0010];>>pie3(y,explode,{'1','2','3','4'})4.3.5 离散数据图
>>x=0:0.1:2*pi;>>y=sin(x).*exp(-2*x);>>subplot(4,1,1)>>stem(x,y,'filled')>>subplot(4,1,2)>>stairs(x,y)>>subplot(4,1,3)>>scatter(x,y)>>subplot(4,1,4)z=cos(x).*exp(2*x)>>stem3(x,y,z)4.3.6 对数坐标和极坐标图
1、对数坐标图形
>>w=logspace(-2,3,20);>>Aw=1./(w.*sqrt((0.5*w).^+1));>>Lw=20*log10(Aw);>>semilogx(w,Lw)>>title('对数幅频特性曲线')>>w=logspace(-2,3,20);Aw=1./(w.*sqrt((0.5*w).^+1));Lw=20*log10(Aw);semilogy(w,Lw)title('对数幅频特性曲线')>>w=logspace(-2,3,20);Aw=1./(w.*sqrt((0.5*w).^+1));Lw=20*log10(Aw);loglog(w,Lw)title('对数幅频特性曲线')2、极坐标图
>>w=logspace(-2,3,20);>>Fw=-90-atan(0.5*w);>>Aw=1./(w.*sqrt((0.5*w).^+1));>>polar(Fw,Aw)4.3.7 等高线图
>>[x,y,z]=peaks;>>contour(x,y,z)>>[x,y,z]=peaks;>>contour(x,y,z)>>contour3(z,30)4.3.8 复向量图
1、compass命令
2、feather命令
>>theta=0:0.2:2*pi;>>z=sin(theta).*exp(j*theta);>>compass(z)>>theta=0:0.2:2*pi;>>z=sin(theta).*exp(j*theta);>>compass(z)>>feather(z)
4.4 图形窗口的功能
1、工具栏
2、选单
4.5 对话框
1、“输入信息”对话框
>>prompt={'A','B'};>>defans={'0.707','1'};>>p=inputdlg(prompt,'input dialog',1,defans)p=2×1cell 数组{'0.707'}{'1'}
2、“输出信息”对话框
msgbox('阻尼系数输入范围出错','警告','warn')warndlg('阻尼系数输入范围出错','警告')errordlg('阻尼系数输入范围出错','出错')helpdlg('欠阻尼系数应大于0小于1','帮助')>>button=questdlg('是否确认?','Are you sure?','Yes','No','Yes')button='Yes'3、文件管理对话框
[fname,pname]=uigetfile('*.*','打开文件',100,100)[fname,pname]=uiputfile('Ex0431.mat','保存文件')
