How to replace a rectangle with another rectangle?

(Or change the properties of the first rectangle)

I had 2 ideas of how to replace the rectangle, but both don't work. But here they are:

Idea 1:

r = findobj('FaceColor', [0.2 0.2 0.7])
r.FaceColor = [0.2 0.2 0.2]

Idea 2:

r = rectangle(findobj('FaceColor', [0.2 0.2 0.7]))
r.FaceColor = [0.2 0.2 0.2]

Idea 3:

    r = findobj('FaceColor', [0.2 0.2 0.7])
    rectangle('Position',r.Position,'LineWidth',1, 'FaceColor', [0.2 0.2 0.7])

I think you can't story a rectangle in a variable but I'm not sure and don't know how to do it otherwise. I want to change the facecolor of the rectangle with the facecolor [0.2 0.2 0.7].

[Walter Roberson]

The form in Idea 1 worked when I tried it, if the goal is to change the color of an existing rectangle without creating a new one.

[Kirsten Moons]

Okay, thank you for your feedback. Then I don't know why it doesn't work for me.

Answer 1

[Ridwan Alam]

I tried this, it worked for me:

r = rectangle('FaceColor', [0.2 0.2 0.7]);
r.FaceColor = [0.2 0.2 0.2];

[Kirsten Moons]

I dont know the position of the rectangle, thats why I use findobj.

[Ridwan Alam]

Even this worked:

r = rectangle('FaceColor', [0.2 0.2 0.7]); % created the rectangle
r1 = findobj('FaceColor', [0.2 0.2 0.7]); % finds the rectangle handle
r1.FaceColor = [0.2 0.2 0.2]; % change rectangle property using handle

Please let me know which part is not working for you.

Btw, if the rectangle doesn't exist, findobj() returns an empty handle.