MATLAB实例：二维散点图
作者：凯鲁嘎吉 - 博客园 http://www.cnblogs.com/kailugaji/
更多请看：随笔分类 - MATLAB作图
用MATLAB实现简单的散点图的绘制，可以自行设置点的形状与颜色，可以去掉坐标轴边框。
数据来源：MATLAB高斯混合数据的生成 将二维数据保存为gauss.txt。
1. demo.m
% data_load: https://www.cnblogs.com/kailugaji/p/10861064.html
% data_load: 前两列是二维数据，最后一列是类标签
data_load=dlmread(\'.\gauss.txt\');
figure(1)
plot(data_load(data_load(:, end)==1, 1), data_load(data_load(:, end)==1, 2), \'b.\', \'MarkerSize\',12 );
hold on
plot(data_load(data_load(:, end)==2, 1), data_load(data_load(:, end)==2, 2), \'r^\', \'MarkerSize\',6, \'MarkerFaceColor\',\'r\');
plot(data_load(data_load(:, end)==3, 1), data_load(data_load(:, end)==3, 2), \'ko\', \'MarkerSize\',6, \'MarkerFaceColor\',\'g\');
plot(data_load(data_load(:, end)==4, 1), data_load(data_load(:, end)==4, 2), \'rp\', \'MarkerSize\',6, \'MarkerFaceColor\',\'y\');
plot(data_load(data_load(:, end)==5, 1), data_load(data_load(:, end)==5, 2), \'mh\', \'MarkerSize\',6, \'MarkerFaceColor\',\'m\');
ylabel(\'X\');
xlabel(\'Y\');
% set(gca,\'Visible\',\'off\') %去掉横纵坐标边框
saveas(gcf,sprintf(\'demo_2D.jpg\'),\'bmp\'); %保存图片
2. 结果
去掉边框后：