Matlab drawing 3

Matlab画图 3

1.练习：Complete the effect of the picture below

G=[46 38 29 24 13]; S=[29 27 17 26 8]; B=[29 23 19 32 7];
h=bar(1:5,[G' S' B']);
set(h(1),'FaceColor',[1 1 0]);
set(h(2),'FaceColor',[0.7 0.7 0.7]);
set(h(3),'FaceColor',[1 0.6 0.1]);
title('Medal count for top 5countries in 2012 Olympics');
ylabel('Number of medals'); xlabel('Country');
set(gca, 'XTickLabel',{'USA','CHN','GBR','RUS','KCR'});
legend('Gold','Silver','Bronze');

 

结果如下  

2.imagesc函数、color bar与color map

适用场景：When a multi-dimensional image is difficult to visually reflect changes in values,利用imagescThe function displays the image using color;ColorBarIt acts as a legend in the figure,ColorMapYou can adjust the color temperature

eg：

[x,y]=meshgrid(-3:.2:3,-3:.2:3);
z=x.^2+x.*y+y.^2;surf(x,y,z);box on;
set(gca,'FontSize',16);zlabel('z');
xlim([-4 4]);xlabel('x');ylim([-4 4]);ylabel('y');colormap('turbo');
imagesc(z);axis square;xlabel('x');ylabel('y');
colorbar;colormap('turbo');

结果如下

3.3D绘图 3D Plots

4.mesh()与surf()

mesh是表格,surface是表面

eg：

x=-3.5:0.2:3.5;y=-3.5:0.2:3.5;
[X,Y]=meshgrid(x,y);
Z=x.*exp(-X.^2-Y.^2);
subplot(1,2,1);mesh(X,Y,Z);
subplot(1,2,2);surf(X,Y,Z);

结果如下

meshc()和surfc()与mesh()与surf()The difference is that there will be one more at the bottomcontour图像

5.Various Countour Plots

eg：

x=-3.5:0.2:3.5;y=-3.5:0.2:3.5;
[X,Y]=meshgrid(x,y);
Z=x.*exp(-X.^2-Y.^2);
subplot(1,2,1);mesh(X,Y,Z);
axis square
subplot(1,2,2);contour(X,Y,Z);
axis square;

结果如下：

6.view(),light(),patch()

不想看了,摆烂