display rectangle on top of plotyy

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Sebastian Roehn
Sebastian Roehn 2016-3-25
评论： Mike Garrity 2016-3-25
Hello community,
I would like to draw a rectangle on top of a plotyy. But the second plot data are always on top of the rectangle. I tried it with uistack, but that isn't working. Here is a small example...
[axh,hLine1,hLine2] = plotyy(1:100,randn(100,1),1:100,randn(100,1));
h = rectangle('Position',[1,0,20,3],'LineWidth',2);
% rectangle on top
uistack(h,'top')
uistack(hLine2,'down')
I really appreciate any help you can provide.
Greetings Sebastian

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采纳的回答

Mike Garrity
Mike Garrity 2016-3-25
The first return value from plotyy (axh in your case) is an array of two handles. Try putting the rectangle in the other one. In other words, this:
[axh,hLine1,hLine2] = plotyy(1:100,randn(100,1),1:100,randn(100,1));
rectangle(axh(1),'Position',[1,0,20,3],'LineWidth',2)
is different from this:
[axh,hLine1,hLine2] = plotyy(1:100,randn(100,1),1:100,randn(100,1));
rectangle(axh(2),'Position',[1,0,20,3],'LineWidth',2)
  2 个评论
Sebastian Roehn
Sebastian Roehn 2016-3-25
Hello Mike,
thank you for your answer. But that isn't working, because you cannot specify an axes handle on a rectangle. You get this error:
Error using rectangle
Can't specify convenience arg for this object
Error in plotyy_rectangle (line 2)
h = rectangle(axh(2),'Position',[1,0,20,3],'LineWidth',2);
But your answer brought me to this solution:
hfig = figure(1);
[axh,hLine1,hLine2] = plotyy(1:100,randn(100,1),1:100,randn(100,1));
set(hfig,'CurrentAxes',axh(2))
h = rectangle('Position',[1,0,20,3],'LineWidth',2);
Greetings Sebastian
Mike Garrity
Mike Garrity 2016-3-25
Sorry, I think that the 1st arg for rectangle was added in R2016a. It's just shorthand for a form that's been around for a long time:
rectangle('Position',[1,0,20,3],'LineWidth',2,'Parent',axh(2))
Most of the graphics objects take that first arg form. We've recently been going through and adding it to the ones which didn't have it.

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