[X,Y]=meshgrid(x0,y0);
时间: 2024-06-03 14:08:41 浏览: 18
This line of code creates two matrices, X and Y, using the vectors x0 and y0 as input.
The matrix X has the same number of rows as y0 and the same number of columns as x0, and each element of X is equal to the corresponding element of x0.
The matrix Y has the same number of rows as x0 and the same number of columns as y0, and each element of Y is equal to the corresponding element of y0.
Together, X and Y create a grid of coordinates that can be used for plotting functions that depend on two variables.
相关问题
修改为均匀采样x0= linspace(-2, 2, 100); y0= linspace(-2, 2, 100); [X, Y] = meshgrid(x, y); for i=1:100 z0(i)=x0(i)*exp(-x0(i)^2+y0(i)); end
好的,修改后的代码如下:
```matlab
x0 = linspace(-2, 2, 100);
y0 = linspace(-2, 2, 100);
[X, Y] = meshgrid(x0, y0);
z0 = zeros(100, 100);
for i = 1:100
for j = 1:100
z0(i, j) = x0(i) * exp(-x0(i)^2 + y0(j));
end
end
```
这里使用了两个嵌套的循环来计算 `z0` 矩阵中每个元素的值。注意到我们使用了 `zeros` 函数来先初始化 `z0` 矩阵,然后再逐个计算每个元素的值。
修改为全局网格采样,采点一百个。x0= linspace(-2, 2, 100); y0= linspace(-2, 2, 100); [X, Y] = meshgrid(x, y);
好的,我来帮您修改代码:
```
x0 = linspace(-2, 2, 100);
y0 = linspace(-2, 2, 100);
[X, Y] = meshgrid(x0, y0);
Z = sin(X.^2 + Y.^2) ./ (X.^2 + Y.^2);
surf(X, Y, Z);
```
这样就可以实现全局网格采样,采点一百个,并且范围是从 -2 到 2。函数的值计算同样使用 sin(X.^2 + Y.^2) ./ (X.^2 + Y.^2)。如果您有其他问题,欢迎随时问我。
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