matlab中二维画图作业（周二软件打卡四）

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今天小编为大家带来Matlab三维绘图（2）介绍，

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Today, the editor brings you introduction of Matlab three-dimensional drawing（2）,

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01

三维球面图

函数[X,Y,Z] = sphere(n) 在三个大小为 (n 1)×(n 1) 的矩阵中返回 n×n 球面的坐标。可以用 surf(X,Y,Z) 或 mesh(X,Y,Z) 来绘制该球面。[X,Y,Z]为球心坐标，默认为0；通过改变球心位置，在同一空间绘制多个球面。

The function [X,Y,Z] = sphere(n) returns the coordinates of an n×n sphere in three matrices of size (n 1)×(n 1). The sphere can be drawn with surf(X,Y,Z) or mesh(X,Y,Z) . [X, Y, Z] are the coordinates of the center of the sphere, and the default value is 0; by changing the position of the center of the sphere, multiple spheres are drawn in the same space.

输入如下代码：

Enter the following code:

运行结果如下：

The results are as follows:

02

三维网格图

在Matlab中，进行三维图形绘制时，常常需要首先创建三维网格，也就是先创建平面图的坐标系。在Matlab中，常用meshgrid()函数生成网格数据，其调用格式为：[X,Y]=meshgrid(x,y)

In Matlab, when drawing 3D graphics, it is often necessary to create a 3D grid first, that is, to create the coordinate system of the plan first. In Matlab, the meshgrid() function is commonly used to generate grid data, and its calling format is: [X,Y]=meshgrid(x,y)

输入如下代码：

Enter the following code:

运行结果如下：

The results are as follows:

03

三维饼图

pie3(X) 使用 X 中的数据绘制三维饼图。X 中的每个元素表示饼图中的一个扇区。pie3(X,explode) 指定是否从饼图中心将扇区偏移一定位置。pie3(...,labels) 指定扇区的文本标签。标签数必须等于 X 中的元素数。

pie3(X) draws a three-dimensional pie chart using the data in X. Each element in X represents a slice in the pie chart. pie3(X,explode) Specifies whether to offset the slice from the center of the pie by a certain position. pie3(...,labels) Specifies the text labels for the sectors. The number of labels must equal the number of elements in X

输入如下代码：

Enter the following code:

运行结果如下：

The results are as follows:

04

三维柱体

[X,Y,Z]=cylinder(r,n)表示生成半径为r,高度为1的矩阵x,y,z,利用这三个矩阵可以绘制出半径为r,高度为1的柱体，圆柱体的圆周有指定的n个距离相同的点。

[X,Y,Z]=cylinder(r,n) means to generate a matrix x, y, z with a radius of r and a height of 1. Using these three matrices, a cylinder with a radius of r and a height of 1 can be drawn. The circumference of the cylinder has the specified n points at the same distance.

输入如下代码：

Enter the following code:

运行结果如下：

The results are as follows:

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参考资料：谷歌翻译，百度

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