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

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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

Answers (1)

Walter Roberson
Walter Roberson on 16 Feb 2018
Edited: Walter Roberson on 16 Feb 2018
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
  2 Comments
Nipurn Gulgulia
Nipurn Gulgulia on 16 Feb 2018
Edited: Nipurn Gulgulia on 16 Feb 2018
Sorry I am not getting it!! Can you explain or show me !
Walter Roberson
Walter Roberson on 16 Feb 2018
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);

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