GUI not storing handles correctly

data is a folder containing about 12 excel files

I need the data in the entire column of each excel file labeled "HeadRight"

The data is to later be put into a matrix using a user defined function and then used to build a graph via the patchline function.

However, every time I run the code, it says that "HeadRight" is undefined code:

% --- Executes on button press in headdata.

function headdata_Callback(hObject, eventdata, handles)

% hObject    handle to headdata (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% Hint: get(hObject,'Value') returns toggle state of headdata

      handles = guidata(hObject);

      if (get(hObject,'Value') == get(hObject,'Max'))
          for i = 1:length(handles.data)
              handles.datapatch = handles.data(i).HeadRight
              handles.int = handles.data(1).DetectionCode
              guidata(hObject,handles)
              display('headdata works')
          end
      end
  end

[per isakson]

Have did you verified that

    handles.data(*).HeadRight

is assigned values correctly? Where is it done?

[Zeke Merchant]

This is the subfunction of the GUI where the array "HeadRight" is created. This is the first place it is mentioned.

[Image Analyst]

headdata is a pushbutton. Why are you checking its max property?

How did you attach an array called "data" to the handles structure? And then how did you attach HeadRight to the handles.data structure array?

[Jan]

@Zeke Merchant: I do not understand, where HeadRight is created. It is not created in the posted code, so I guess you fogot a guidata update after it has been defined anywhere else.

Please care for posting a full copy of the error message. A rough rephrasing cinceals important details usually.

[Zeke Merchant]

The max property of the pushbutton is checked because there are 3 options for data output: headdata, platedata, and relheaddata. I've tried using a buttongroup with 3 "cases" but this method didn't work so I'm trying another.

"data" was added to the handles structure in an earlier subfunction that can be seen below:

code:

function readdir_Callback(hObject, eventdata, handles)

% hObject handle to readdir (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

directory=get(handles.textbox1,'String');

files=dir(directory);

for i=1:(length(files)-2)

    s=files(i+2).name;

    s=strcat('\',s);

    L=strcat(directory, s);

   [num, txt, all] = xlsread(L); %%your excel file must not have first line titles

for j=1:length(txt);

    txt{j}=regexprep(txt{j},'','NaN');

    %delete space in string

    % text{j}=num(:,j);

    handles.data(i).(txt{j})=num(:,j);

guidata(hObject,handles);

end

guidata(hObject,handles)

end

display('readdir works')

"HeadRight" and "RightFrontPlate" are the column names in each of the 12 excel files in "data."

My goal is to have "datapatch" be either the head right, right front plate, or relative head data (simply a difference of the first two) from each of the excel files, based on which radiobutton the user chooses.

The error message that prints can be seen below:

??? Reference to non-existent field 'HeadRight'.

Error in ==> GUI_Patchline>headdata_Callback at 309

        handles.datapatch = handles.data(i).HeadRight

Error in ==> gui_mainfcn at 96 feval(varargin{:});

Error in ==> GUI_Patchline at 41 gui_mainfcn(gui_State, varargin{:});

Error in ==> @(hObject,eventdata)GUI_Patchline('headdata_Callback',hObject,eventdata,guidata(hObject))

??? Error while evaluating uicontrol Callback

Here's the kicker, when I click on the platedata radiobutton instead, here's what the updated handles list looks like:

handles =

          figure1: 173.0012
        platedata: 12.0013
      relheaddata: 11.0013
         headdata: 10.0013
       patchradio: 9.0013
          int_2_2: 8.0013
          int_2_1: 7.0013
          int_1_2: 6.0013
          int_1_1: 5.0013
           stimno: 4.0013
          stimyes: 3.0013
    plotpatchline: 2.0013
          readdir: 1.0013
        choosedir: 0.0013
         textbox1: 174.0012
           output: 173.0012
             data: [1x12 struct]
           int1_1: 0
           int1_2: 2500
           int2_1: 2501
           int2_2: 5000
        datapatch: [5500x1 double]
              int: [18x1 double]

platedata works

The datafiles are about 5000-6000 cells long, int is an excel file that I made and has the right dimensions, and the int*_* terms are user defined. The platedata radiobutton works, but the headright one creates that error message.

Answer 1

[Image Analyst]

Evidently your "data" field does not have a HeadRight field. What does this say:

fn = fieldnames(handles.data(1))

in the command window.

[Zeke Merchant]

The command window reads:

"??? Undefined variable "handles" or class "handles.data"."

but the bottom of the handles list says:

           int1_1: 0
           int1_2: 2500
           int2_1: 2501
           int2_2: 5000
           data: [1x4 struct]
           datapatch: [4000x1 double]
           int: [18x1 double]