MATLAB 3D图

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📜 MATLAB 3D图

📅 最后修改于: 2021-01-07 02:51:40 🧑 作者: Mango

MATLAB还包含各种三维图，这些图对于显示某些类型的数据很有用。通常，三维图有助于显示两种类型的数据：

为了获得z，首先，我们必须使用meshgrid函数创建一组(x，y)点。

[X，Y] = meshgrid(-1：.2：1);

此处，函数meshgrid中的参数是一个向量，使用冒号运算符创建(开始：步骤：结束)

meshgrid函数最多可以包含三个向量参数，并根据参数中向量的坐标返回二维坐标。

Grid coordinates set (matrix)	Function	Vector coordinates	Grid length
[X,Y], X & Y are matrices, where each row is a copy of x, and each column is a copy of y respectively.	=meshgrid(x,y), returns 2-D grid coordinates based on x & y	Coordinates of Vector x and y	No. of rows in X & Y = length(y), No. of columns in X & Y = length(x)
[X,Y], X & Y are matrices, where each row and column is a copy of x.	=meshgrid(x), equivalent to meshgrid(x,x), and returns square 2-D grid coordinates based on x	Coordinates of Vector x	Grid size = length(x) by length(x)
[X, Y, Z], X have coordinates of x, Y have coordinates of y, and Z have coordinates of z	=meshgrid(x,y,z), returns 3-D grid coordinates based on vectors x, y, & z	Coordinates of Vectors x, y, and z.	Grid size = length(y) by length(x) by length(z)
[X,Y,Z], All have same coordinates of x	=meshgrid(x), is same as meshgrid(x,y,z) in the form of meshgrid(x,x,x)	Coordinates of Vector x	3-D grid size = lenght(x) by length(x) by length(x)

现在评估Z以创建3-D图：

Z = X. * exp(-X。^ 2-Y. ^ 2); ％点。运算符用于执行逐元素计算。

现在，我们将使用函数surf(X，Y，Z)创建一个3-D表面图。

通过输入surf函数，它将生成3-D表面图。