根据数据的密度进行作图

clear

clc

close all

% 生成随机数据

num_points = 4000;

x = randn(num_points, 1);

y = randn(num_points, 1);

% 定义网格并计算密度

grid_size = 50;

[x_grid, y_grid] = meshgrid(linspace(min(x), max(x), grid_size), linspace(min(y), max(y), grid_size));

density = histcounts2(x, y, linspace(min(x), max(x), grid_size+1), linspace(min(y), max(y), grid_size+1));

% 生成颜色矢量，根据点的密度给定颜色深浅

density = density / max(density(:));

colors = interp2(x_grid, y_grid, density', x, y);

% 绘制散点图

scatter(x, y, 20, colors, 'filled');

colorbar;

xlabel('X轴');

ylabel('Y轴');

title('密度相关的散点图');