MATLAB實例：二維散點圖

MATLAB實例：二維散點圖

做者：凱魯嘎吉 - 博客園 http://www.cnblogs.com/kailugaji/

更多請看：隨筆分類 - MATLAB做圖

    用MATLAB實現簡單的散點圖的繪製，能夠自行設置點的形狀與顏色，能夠去掉座標軸邊框。

    數據來源：MATLAB高斯混合數據的生成 將二維數據保存爲gauss.txt。

1. demo.m

% data_load: https://www.cnblogs.com/kailugaji/p/10861064.html
% data_load: 前兩列是二維數據，最後一列是類標籤
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') %去掉橫縱座標邊框
saveas(gcf,sprintf('demo_2D.jpg'),'bmp'); %保存圖片

2. 結果

去掉邊框後：