matlab - 如果 y 方向设置为 'reverse'，如何修复 Matlab 中矢量注释头的错误对齐

Question

代码

figure
scatter([1,2,3],[1,2,3]);
ax = gca;
ax.YDir = 'reverse'
ah = annotation('arrow','position',[ 2.5 2.5 -1 -1]);
set(ah,'parent',ax);

给出了错误的矢量头对齐方式:

有什么解决办法吗？

Answer 1

处理该问题的一种方法是使用两个单独的注释创建箭头和线:

figure
scatter([1,2,3],[1,2,3]);
ax = gca;
ax.YDir = 'reverse'

%Define the variable
xac = 2.5; %x arrow coordinate
yac = 2.5; %y arrow coordinate
xas = -1;   %x arrow shift
yas = -1;   %y arrow shift

if get(ax,'Ydir') == 'reverse':
   %Create the arrow
   ah1 = annotation('arrow','position',[ xac yac+2*yas xas -yas],'linestyle','none');
   set(ah1,'parent',ax);
   %Create the line
   ah2 = annotation('arrow','position',[ xac yac xas yas],'headstyle','none');
   set(ah2,'parent',ax);
else:
   ah = annotation('arrow','position',[ xac yac xas yas]);
   set(ah,'parent',ax);
end

箭头坐标现在是 xac yac+2*yas xas -yas,

结果: