MATLAB: How to plot the first 2 columns from a .csv file when the user selects an option from a pop menu

plot

This is the code I have, what is the next step to callback the 'option 1' at the pop menu? and that it plots the 2 first colums? 
% --- Executes on button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% 
handles.fileName=uigetfile({'*.csv;';'*.mat';'*.*'},...
                          'File Selector');
                      C = strsplit(handles.fileName,'.');

Best Answer

Use the readmatrix function rather than strsplit. This may help you :- 
% --- Executes on button press in pushbutton1. 
function pushbutton1_Callback(hObject, eventdata, handles) 
% hObject    handle to pushbutton1 (see GCBO) 
% eventdata  reserved - to be defined in a future version of MATLAB 

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

handles.fileName=uigetfile({'*.csv;';'*.mat';'*.*'},... 
                          'File Selector'); 
guidata(hObject, handles);%This updates the handles structure
Now at the popupmenu1_Callback: - 
% --- Executes on selection change in popupmenu1. 
function popupmenu1_Callback(hObject, eventdata, handles) 
% hObject    handle to popupmenu1 (see GCBO) 
% eventdata  reserved - to be defined in a future version of MATLAB 
% handles    structure with handles and user data (see GUIDATA) 
contents = cellstr(get(hObject,'String'));%Gets the cell string of popupmenu 
pop_choice = contents{get(hObject,'Value')}; 
if(strcmp(pop_choice,'option 1'))%Checking for option 1 
    array = readmatrix(handles.fileName);%Reading the csv file 
    col1 = array(:, 1);%Values of Column 1 
    col2 = array(:, 2);%Values of Column 2 
    plot(col1,col2);%Plotting Column 1 vs Column 2 
end
You can refer the following link to know more about readmatrix: -
https://in.mathworks.com/help/matlab/ref/readmatrix.html
Hope this helps!
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