MATLAB: Are title and x/y lable not listed in Children property of axes

gcographic objecthandlesMATLABobject propertyparent/children relation

Hi there,
I tried
>> allchild(ax)
ans = 
6x1 graphics array:
Group
Line
Line
Line
Line
Line
which is supporsed to list all, including hidden children of axes. However it turns that there were only 5 lines that I draw and a empty group.
    >> ax.Children(1)
ans =   
Group with properties:
    Children: [0x0 GraphicsPlaceholder]
     Visible: 'on'
     HitTest: 'on'e
So could someone help to expain why title and x/y lables are gone? If you do
Title.Parent
  ans = 
Axes
How come it is not a Children of axes while at same time its parent is axes?
And also why can't I get the handle of a title by using
    gco
ans = 
0x0 empty GraphicsPlaceholder array.
when Title is obviously an object (primitive.Text)
Thanks so much for help!

Best Answer

The title handle and the handles to the axes labels are stored in properties Title, XLabel, YLabel, and ZLabel in the axes rather than being Children of the axes. See the "Title and Axes Labels" section in the Axes Properties documentation for more information, including a Note that states they are not Children of the axes.
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