@Veronica – you are using the new version of uitree, which uses HTML-based uifigures, and my post was about the Java-based uitree which uses legacy Matlab figures. For details on customizing the new uifigure tree-nodes, see the uitreenode documentation. Specifically, to change the node name, set its Text property, e.g. node.Text='new node name'. To use html formatting you’d need to use uistyle, which is fully documented and outside the scope of this website.

>> [txt1,txt2]
ans =
‘abrakadabra’

txt1 = 'abra';
txt2 = 'kadabra';
node.setName([txt1,txt2]);
>> "Unrecognized method, property, or field 'setName' for class 'matlab.ui.container.TreeNode'

Now there is no property ”Name”. I tried:

node.Text([txt1,txt2]);
>> Index exceeds the number of array elements. Index must not exceed 39. 

[txt1,txt2]
ans =
    'abrakadabra'

Any suggestion?

I understand Yair,
Thank you very much for all your valuable assistance. I think I can manage with the options I have now, but I will contact you as professional consultant if I face some other issue. Best,
Ana

@Ana – it appears that you need to customize a complex GUI, and require more than simple answers to simple queries, which is beyond the scope of a blog Q&A. I’ll be happy to assist you as a professional consultant, contact me if you wish: altmany at gmail dot com.

Thank you very much Yair. yes I was doing something wrong. I was able to remove the root now 🙂
As you say I am using the Java-based component, in a Matlab 2016b, quite old, but the method does exist.
However for checkboxtree’s, removing the root gives a not very satisfactory result, as it becomes not very intuitive hoy to expand and collapse the tree. The problem I had with the root is that, when some leaf has too many subleaves and I collapse it, very often also the root is clicked, so that all the selections that I made get lost, is this a known issue? Thank you!!

Ana, I believe that you are mistaken. Assuming you’re using the Java-based (not the new web-based) checkboxtree component (as described in http://undocumentedmatlab.com/articles/customizing-uitree-nodes-2#Built-in-classes), then even in R2021b the jCheckBoxTree object has a setRootVisible(flag) method.
Perhaps you are using a very old Matlab release in which this method still did not exist.

Thank you for the prompt answer!
Is this also possible with checkboxtree? Because I am having some trouble with the method setRootVisible in this case.

No method ‘setRootVisible’ with matching signature found for class ‘com.mathworks.mwswing.checkboxtree.CheckBoxTree’.

@Ana –

mtree.Tree.setRootVisible(false)