How to pass data from one GUI to an other? Matlab - matlab

Question

I am using a sub GUI to open the main GUI. In the sub GUI a pushbutton aLLows the user to select the data files they would like to upload. The first file is dealt with seperately and is then passed to the main GUI using setappdata and getappdata. Here is the code for the push button in the sub GUI:
% --- Executes on button press in ManualMultiple.
function ManualMultiple_Callback(hObject, eventdata, handles)
% hObject handle to ManualMultiple (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
[FileName,PathName,FilterIndex] = uigetfile('*.txt*','MultiSelect','on');
numfiles = size(FileName,2);
setappdata(0,'files',numfiles)
FileData= cell(1,numfiles);
for ii = 1:numfiles
FileName{ii};
A=[];
entirefile =fullfile(PathName,FileName{ii});
fid = fopen(entirefile);
tline = fgets(fid);
while ischar(tline)
parts = textscan(tline, '%f;');
if numel(parts{1}) > 0
A = [ A ; parts{:}' ];
end
tline = fgets(fid);
end
fclose(fid);
FileData{ii} = A;
A = FileData{ii};
X1 = A(:,1);
Y1 = A(:,5);
DataToUse{ii} = [X1, Y1];
end
FirstLoopX1Y1 = DataToUse{1};
X = FirstLoopX1Y1(:,1);
Y = FirstLoopX1Y1(:,2);
setappdata(0,'XValue',X)
setappdata(0,'YValue',Y)
for i = 2:numfiles
OtherLoopsXY = DataToUse{i};
X3 = OtherLoopsXY(:,1);
Y3 = OtherLoopsXY(:,2);
DataUseLater{i} = [X3,Y3]
end
setappdata(handles.ManualMultiple,'Data',DataUseLater)
GUImainwindow
Then when I push a button in the main GUI i should get the data sent from the sub to preform calculations on this data. Here is the code:
% --- Executes on button press in CalculateIntensity.
function CalculateIntensity_Callback(hObject, eventdata, handles)
% hObject handle to CalculateIntensity (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Trapz function
starting_value = getappdata(0,'StartValue');
ending_value = getappdata(0,'EndValue');
StartingValue = str2num(starting_value);
EndingValue = str2num(ending_value);
A = getappdata(0,'XYarray');
%line 122 and 123 finds location of data in the entire spectrum
[~,indx1]=ismember(StartingValue,A,'rows');
[~,indx2]=ismember(EndingValue,A,'rows');
arrayfortrapz = A(indx1:indx2,1:2);
setappdata(0,'arraytapz',arrayfortrapz);
[value,index] = max(arrayfortrapz(:,2)); %finds max intensity / peak value
PeakValue = arrayfortrapz(index,1);
handles.Peak_Value = PeakValue;
guidata(hObject,handles);
X1 = arrayfortrapz(1:end,1);
Y1 = arrayfortrapz(1:end,2);
AUC = trapz(X1,Y1); %intergration
str = num2str(AUC);
[s,v] = listdlg('PromptString','Calculated Intensity:','SelectionMode','single','ListString',str,'ListSize',[200 200]);
IntensityValue = str(s,:);
setappdata(0,'IV',IntensityValue);
DataUseLater = getappdata(handles.ManualMultiple,'Data')
But when I push this button in the main GUI i get the errors:
Reference to non-existent field 'ManualMultiple'.
Error in MichelleLaycockGUImainwindow>CalculateIntensity_Callback (line 207)
DataUseLater = getappdata(handles.ManualMultiple,'Data')
Can anyone tell me how I could resolve this problem or even help me see where I am going wrong? Thanks in advance

Answer 1

What if you add guidata(hObject,handles) after this line:
setappdata(handles.ManualMultiple,'Data',DataUseLater) in your main window? It looks as if the handles structure was not updated after you created handles.ManualMultiple