% 準備一張自己的背景圖片
img = imread('mypicture.png');
% 設定圖片在繪製時的尺寸
min_x = 0;
max_x = 52.5;
min_y = 0;
max_y = 20;

%繪製自己的圖形的資料

alteredX=[38.7 43.6 20.1 7.8 7.9];
alteredY=[5.5 16.8 19.1 7.5 17.6];

%插入背景圖 

imagesc([min_x max_x], [min_y max_y], flipdim(img,1)); 
% NOTE: if your image is RGB, you should use flipdim(img, 1) instead of flipud.
 
hold on;

%繪製自己的圖形
plot(alteredX,alteredY,'r','MarkerSize',10); 
set(gca,'ydir','normal');