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今天小编为大家带来MATLAB三维绘图（1），欢迎您的用心访问！本期推文时长大约3分钟，请您耐心阅读。
Share interest, spread happiness, increase knowledge, and leave beautiful. Dear, this is the Learing Yard Academy!
Today, the editor brings the MATLAB 3D drawing (1). Welcome to visit! This tweet usually takes about 3 minutes to read. Please read patiently.
前两期，小编和大家一起学习了MATLAB二维图绘制。这一期，我们一起来学习一下MATLAB三维图绘制吧~
In the first two issues, the editor and everyone learned MATLAB two-dimensional drawing together. In this issue, let's learn about 3D drawing in MATLAB~
三维饼图
三维饼图和二维饼图的绘制差距不大，只需要将pie(x)函数换成pie3(x)。
我们输入：
x = [1,3,5,7,2];
pie3(x)
会得到一个三维饼图。
There is not much difference between the drawing of 3D pie chart and 2D pie chart, you only need to replace the pie(x) function with pie3(x).
We enter:
x = [1,3,5,7,2];
pie3(x)
You will get a 3D pie chart.
在这个基础上，如果我们想要凸显占比比较多的39%那一部分，我们可以给它设置一个偏移量。
我们继续输入：
explode = [0,0,0,1,0];
figure
pie3(x,explode)
其中，explode中，0是表示对应位置的数据不偏移，1表示对应位置的数据偏移。偏移后的效果如下：
On this basis, if we want to highlight the 39% that accounts for more, we can set an offset to it.We continue to enter:
explode = [0,0,0,1,0];
figure
pie3(x,explode)
Among them, in explode, 0 means that the data of the corresponding position is not offset, and 1 means that the data of the corresponding position is offset. The effect after offset is as follows:
三维点或线图
三维点或线图使用的是plot3(X)函数。我们输入：
x = 0:0.01:10*pi;
y = sin(x);
z = cos(x);
plot3(x,y,z)
会得到：
3D point or line plots use the plot3(X) function. We enter:
x = 0:0.01:10*pi;
y = sin(x);
z = cos(x);
plot3(x,y,z)
will get:
当间距设置较大时，线图也就变成了点图。我们还可以根据自己喜好设置自己喜欢的颜色和线型。
我们输入：
x = 0:0.1:10*pi;
y = sin(x);
z = cos(x);
plot3(x,y,z,'p','Color','b')
会得到：
When the spacing is set larger, the line graph becomes a dot graph. We can also set our favorite color and line type according to our own preferences.
We enter:
x = 0:0.1:10*pi;
y = sin(x);
z = cos(x);
plot3(x,y,z,'p','Color','b')
will get:
小编在这里使用的是星型标记，蓝色。
The editor used here is the star mark, blue.
曲面图
曲面图的绘制使用到的是surf(X,Y,Z)函数。surf(X,Y,Z) 创建一个三维曲面图，它是一个具有实色边和实色面的三维曲面。该函数将矩阵 Z 中的值绘制为由 X 和 Y 定义的 x-y 平面中的网格上方的高度。曲面的颜色根据 Z 指定的高度而变化。
我们输入：
[X,Y] = meshgrid(1:5:10,1:20);
Z = sin(X) + cos(Y);
surf(X,Y,Z)
会得到：
The surface graph is drawn using the surf(X, Y, Z) function. surf(X,Y,Z) creates a 3D surface plot, which is a 3D surface with solid edges and solid faces. This function plots the values in matrix Z as heights above the grid in the x-y plane defined by X and Y. The color of the surface changes based on the height specified by Z.
We enter:
[X,Y] = meshgrid(1:5:10,1:20);
Z = sin(X) + cos(Y);
surf(X,Y,Z)
will get:
其他曲面/线图及代码展示如下：
Other surface/line graphs and codes are shown below:
//
[X,Y] = meshgrid(-5:.5:6);
Z = Y.*sin(X) - X.*cos(Y);
s = surf(X,Y,Z,'FaceAlpha',0.7)
//
cplxdemo
axis([-1.5,1.5,-1.5,1.5,-1.5,1.5])
axProjection3D('XYZ')
//
xt = @(t) exp(-t/9).*sin(6*t);
yt = @(t) exp(-t/9).*cos(6*t);
zt = @(t) t;
fplot3(xt,yt,zt,[-9 9])
axProjection3D('XYZ')
认识函数：
surf：绘制曲面图
surfc：绘制含有等高线的曲面图
mesh：绘制网格图
meshc：绘制含有等高线的网格图
meshz：绘制含有帷幕的网格图
fsurf：基于函数的曲面图
fmesh：基于函数的网格图
Know the function:
surf: draw a surface graph
surfc: draw a surface plot with contour lines
mesh: draw a mesh graph
meshc: draw a grid with contour lines
meshz: draw a mesh map with curtains
fsurf: function-based surface plot
fmesh: function-based mesh graph
END
今天的分享就到这里了，如果您对文章有独特的想法，欢迎给我们留言。让我们相约明天，祝您今天过得开心快乐！
That's all for today's sharing. If you have a unique idea about the article, please leave us a message, and let us meet tomorrow. I wish you a happy day!
参考资料：谷歌翻译、百度
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