index of the items in a listbox

Using app designer, is it possible to get the index of the selected items from the listbox?

Example: I have 6 items in the listbox; data1, data2, vector1, vector2, vector3 and emc.

If data1, vector1, vector2 and emc are selected, I want to read the location of these items in the listbox, which is 1, 3, 4, 6.

Answer 1

[Guillaume]

I'm not sure what you mean by order. The value property of the listbox tells you which items are selected, so in your example you'll get {'data1', 'vector1', 'vector2', 'emc'}. If you want the index of selected elements, you can either pass your selection to ismember and get its second output, or fill the ItemsData property with the indices:

• using ismember:

listitems = {'data1', 'data2', 'vector1', 'vector2', 'vector3', 'emc'};
hfig = uifigure;
hbox = uilistbox(hfig, 'Items', listitems, 'Multiselect', 'on');
hbox.Value = {'data1', 'vector1', 'vector2', 'emc'};  %simulate user selection

%get index of selected values
[~, index] = ismember(hbox.Value, hbox.Items)

• using ItemsData:

listitems = {'data1', 'data2', 'vector1', 'vector2', 'vector3', 'emc'};
hfig = uifigure;
hbox = uilistbox(hfig, 'Items', listitems, 'ItemsData', 1:numel(listitems), 'Multiselect', 'on');
hbox.Value = [1 3 4 6];  %simulate user selection

%get index of selected values
index = hbox.Value  %returns corresponding ItemsData

[acegi bdegi]

I indeed meant the index. Edited.

It works, thank you!