How to send a value from matlab to mysql?

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Martijn Roks
Martijn Roks 2019-4-12
评论： Martijn Roks 2019-4-13
Hello,
I need to send the value handles.Data to my sql table, but I keep getting a error and don't know how to solve this problem. The value's that goes in to Data are coming from the arduino with a potmeter. And everything works except de sending part. So the function verstuur_calback and then the query=.... code doesn't work.
Could someone help me solve this? Maybe I need to put it in a for loop or something like that, but I don't know.
function inputdata_Callback(hObject, eventdata, handles)
% hObject handle to inputdata (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
board= arduino();
b=0;
for i= 1:1:10
analog= readVoltage (board, 'A0');
writePWMVoltage (board, 'D3', analog);
disp(['analog= ', num2str(analog)]);
pause(1);
A(i)= analog;
b= b+1;
B(i)= b;
end
A=A';
B=B';
handles.Data= [B A];
disp(handles.Data);
colnames= {'PK','Voltage'};
set(handles.uitable2,'data',handles.Data ,'ColumnName',colnames);
guidata(hObject, handles);
function verstuur_Callback(hObject, eventdata, handles)
% hObject handle to verstuur (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
gebruikersnaam= get(handles.edit_gebruikersnaam, 'String');
wachtwoord= get(handles.edit_wachtwoord, 'String');
datasource= get(handles.edit_tabel, 'String');
conn= database(datasource, gebruikersnaam, wachtwoord, handles.driver, handles.url);
query= ['INSERT INTO ' table ' VALUES (''''Data'''')'];
execute(conn,query);
close (conn);
  2 个评论
Geoff Hayes
Geoff Hayes 2019-4-12
编辑：Geoff Hayes 2019-4-12
Martijn - what is the full error message? Is the error from
query= ['INSERT INTO ' table ' VALUES (''''Data'''')'];
(not sure where Data is defined...)
Maybe Guillaume's answer at https://www.mathworks.com/matlabcentral/answers/455843-putting-two-seperate-columns-in-to-one-variable-and-how-to-insert-a-array-into-mysql will help. If this question is in response to his answer, then please further the conversation there rather than creating a new question.
Martijn Roks
Martijn Roks 2019-4-13
This is my full error, I think Data needs to be handles.Data. Because that is where I saved the values from the potmeter (voltage) in de function before.
% Error using Week7>verstuur_Callback (line 158)
%All input arguments must be tables.
%Error in gui_mainfcn (line 95)
% feval(varargin{:})
%Error in Week7 (line 42)
% gui_mainfcn(gui_State, varargin{:});
%Error in
%matlab.graphics.internal.figfile.FigFile/read>@(hObject,eventdata)Week7('verstuur_Callback',hObject,eventdata,guidata(hObject))
%Error while evaluating UIControl Callback.

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