Why does MATLAB can't plot two function 'quiver' in one graph??

Question

sven_sight 2012-9-2

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/47220-why-does-matlab-can-t-plot-two-function-quiver-in-one-graph

I'm using two 'quiver' function but MATLAB only plot one function.

h4=axes('position', [0.1 .55 width height],'box', 'on', 'xcolor', 'k','ycolor',...
       'k');
set(gcf,'color', 'w')
axis equal;
quiver(Px,Py,a44,a44);
quiver(Px,Py,w22,w22);
axis([xmin xmax ymin ymax]);

Thx,,

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Answer 1

Walter Roberson 2012-9-2

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/47220-why-does-matlab-can-t-plot-two-function-quiver-in-one-graph#answer_57701

在 MATLAB Online 中打开

Add the statement

hold on

before the second call to quiver()

quiver() is considered a high-level plotting function, as are all plotting functions other than line(), surface(), patch(), text(), figure() and axis(). The high-level plotting functions automatically clear the existing graphics unless "hold on" or "hold all" (or the internal equivalents) are in effect. This is not specific to quiver().