Question

matlab绘制散点图问题例如,要绘制一个二维坐标图的散点图,要求：1、画出点A(2,3) B(4,5) C(6,7)

Answer 1

axis([0 8 0 8])

hold on

plot(2,3,'k*',4,5,'k*',6,7,'k*',1,6,'k*',4,3,'ro')

text(1.6,3,'A','FontSize',12),text(4.2,5,'B','FontSize',12)

text(6.2,7,'C','FontSize',12),text(1.2,6,'D','FontSize',12)

text(4.2,3,'X','FontSize',12)

line([2 4],[3 3],[0 0],'Color','r','LineWidth',3,'LineStyle','-')

line([4 4],[5 3],[0 0],'Color','r','LineWidth',3,'LineStyle','-')

line([6 4],[7 3],[0 0],'Color','r','LineWidth',3,'LineStyle','-')

line([1 4],[6 3],[0 0],'Color','r','LineWidth',3,'LineStyle','-')