MATLAB: Adding Strings to list box so that if two strings are same, a number will be added.

matlab gui

I have a listbox and add button and an editable text.

On clicking Add button, text will be taken from the edit box and will be added to the listbox.

What i want is that if 1st string of listbox is Material, and the user again entered 'Material' for addition, it will be changed to Material1 and then added to listbox and so on.

Thanks all.

Best Answer

Hi,

(Accept my answer if you found my solution is working for your case, thanks)

Here you go:

Step 1 : Create the said GUI

Step 2 : Create Callback function for Button

Step 3 : Script for the Callback function

or you can copy from here

new=app.EditField.Value;
itemlist = app.ListBox.Items;
match_number=sum(strncmp(new,itemlist,length(new)));
            if match_number == 0
                itemlist{end+1} = new;
                app.ListBox.Items = itemlist;
            else
                new_name = sprintf("%s%i",new,match_number);
                itemlist{end+1} = char(new_name);
                app.ListBox.Items = itemlist;
            end

It is working perfectly. If you have any doubt on the algo, let me know.

Related Solutions

MATLAB: How to Add Element/Item to Listbox in Matlab GUI (push button, listbox)

Thomas - perhaps the condition

~strcmpi(Items_2, Item_1)

is never evaluating to true and so you never enter the body of the while loop. Part of the problem may be because Items_2 is always initialized to an empty cell array (is this intentional?) and is never set to what is currently in your list. Note that if I try the above, with

g = {};
strcmpi(g, 'hello')

then an empty array is returned...so I suspect that is the real problem. The condition is never satisfied. Try doing something like the following instead

function pushbutton2_Callback(hObject, eventdata, handles)
selectedString = handles.selectedItemStr; % assumed to be a string
listBox2Data = get(handles.listbox2,'String');
if isempty(listBox2Data) || ~any(strcmpi(listBox2Data, selectedString))
    listBox2Data = [selectedString, listBox2Data];
    set(handles.listbox2,'String',listBox2Data);
end

No need for a while loop in this case. Note that we use the call to any since the strcmpi may return an array of 0 or 1s for each element in the list box. any will return true if at least one of these elements is a one (indicating that the selected string is already in the list). If the call returns 0 (i.e. no element in list matches the selected string) then we add the item to the list.

MATLAB: Inserting data to listbox

Try this in the callback function of the pushbutton:

listboxItems = handles.popupmenu1.String; % Get existing list from the popup
listboxItems{end+1} = handles.edit10.String; % Append edit field 10.
% Put new list back in the popup:
handles.popupmenu1.String = listboxItems;

You can sort it if you want with sort().

Best Answer

Related Solutions

MATLAB: How to Add Element/Item to Listbox in Matlab GUI (push button, listbox)

MATLAB: Inserting data to listbox

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