matlab散点图均匀选取中心点

可以使用以下步骤在 Matlab 中实现散点图的均匀选取中心点：

1. 生成散点图数据，例如：

x = randn(1000,1);
y = randn(1000,1);
scatter(x,y);

2. 设置选取中心点的数量和边界范围，例如：

num_centers = 10;
x_min = -3;
x_max = 3;
y_min = -3;
y_max = 3;

3. 计算每个中心点的间隔，例如：

x_step = (x_max - x_min) / num_centers;
y_step = (y_max - y_min) / num_centers;

4. 使用循环遍历所有中心点并保存它们的坐标，例如：

centers = zeros(num_centers,2);
for i = 1:num_centers
    x_center = x_min + (i-1)*x_step + x_step/2;
    for j = 1:num_centers
        y_center = y_min + (j-1)*y_step + y_step/2;
        centers((i-1)*num_centers+j,:) = [x_center y_center];
    end
end

5. 绘制所有中心点，例如：

hold on;
scatter(centers(:,1),centers(:,2),'r','filled');

完整代码如下：

x = randn(1000,1);
y = randn(1000,1);
scatter(x,y);

num_centers = 10;
x_min = -3;
x_max = 3;
y_min = -3;
y_max = 3;

x_step = (x_max - x_min) / num_centers;
y_step = (y_max - y_min) / num_centers;

centers = zeros(num_centers,2);
for i = 1:num_centers
    x_center = x_min + (i-1)*x_step + x_step/2;
    for j = 1:num_centers
        y_center = y_min + (j-1)*y_step + y_step/2;
        centers((i-1)*num_centers+j,:) = [x_center y_center];
    end
end

hold on;
scatter(centers(:,1),centers(:,2),'r','filled');