How to add multiple rows in Edit Text box from a list?

I am trying to add strings into a edit text box using a list of strings. But after adding two lines i am getting error "Error using horzcat, Dimensions of matrices being concatenated are not consistent."

   % code
  as.SignalEdit = uicontrol(as.parent,'Style','edit',...
'Units','normalized', 'Position', [0.405, 0.01, 0.6, 0.875]); 
 set(as.SignalEdit,'Max',10000);
%call back function
       function addSignal(as,source,~)
            SignalList = evalin('base','SignalList');
            exist_strings = get(as.SignalEdit,'String');
            All_Signals = get(as.SignalListBox,'String');
            SelectedSignalValue = get(as.SignalListBox,'Value');
            txt = sprintf ([exist_strings, '\n'  ,All_Signals{SelectedSignalValue},'  =']);
            set(as.SignalEdit,'String',[txt,'']);

        end

Answer 1

[Walter Roberson]

When you set() the string of an edit with max greater than one, then it splits the entries at newlines or | and creates a cell array of strings from them. You then run into concatenation problems.

Initialize your string property to {} . Then each time you go to add a new line, fetch the string property (which will be cell) and variable{end+1} = new string and store that back

[Nipurn Gulgulia]

Sorry I am not getting it!! Can you explain or show me !

[Walter Roberson]

 as.SignalEdit = uicontrol(as.parent,'Style','edit',...
'Units','normalized', 'Position', [0.405, 0.01, 0.6, 0.875], 'Max', 10000, 'String', {}); 

       function addSignal(as,source,~)
            All_Signals = get(as.SignalListBox,'String');
            SelectedSignalValue = get(as.SignalListBox,'Value');
            new_signal = All_Signals{SelectedSignalValue};
            signal_list = get(as.SignalEdit,'String');
            signal_list{end+1}  = new_signal;
            set(as.SignalEdit, 'String', signal_list);