Question

I have tried the following code in Matlab:

function pushbutton5_Callback(hObject, eventdata, handles)

global smoothening_level;

global Amp_threshold;

global Min_PeakDistance;

global Mat_wave

global Mat_wave2

global Mat_inten

global pks

Mat_inten2 = smooth(Mat_inten,smoothening_level);

[pks,locs] = findpeaks(Mat_inten2,'minpeakdistance',Min_PeakDistance,'minpeakheight',Amp_threshold)

s = size(pks)

figure(1)

Mat_wave2 = Mat_wave(locs(:));

Mat_inten2loc = Mat_inten(locs(:));

hold all;

plot(Mat_wave,Mat_inten2);

plot(Mat_wave2,pks,'o','MarkerEdgeColor','r');

legend('Ouptut Spectrum','Smoothened Spectrum','Identified Peaks')

axis([350 900 0 max(Mat_inten)]);

xlabel('Wavelength')

ylabel('Intensity')

grid on

title('Plasma Emission Spectrum')

temp(:,1)=Mat_wave2;

temp(:,2)=Mat_inten2loc;

set(handles.uitable8,'Data',num2cell(temp))

However it is giving the following error:

??? Attempt to reference field of non-structure array.

Error in ==> GUI>pushbutton5_Callback at 242
set(handles.uitable8,'Data',num2cell(temp))

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

Error in ==> GUI at 50
    gui_mainfcn(gui_State, varargin{:});

Error in ==> @(hObject,eventdata)GUI('pushbutton5_Callback',hObject,eventdata,guidata(hObject))

??? Error while evaluating uicontrol Callback

Answer 1

The error tells you that handles is not of type struct. Hence, you can not access handles.uitables8. Most likely what you want to write is
set(handles,'Data',num2cell(temp))', but that is just a guess without knowing the rest of your code.