display rectangle on top of plotyy

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

Answer 1

[Mike Garrity]

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)

[Sebastian Roehn]

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]

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.