Make an iucontrol edit box into a number able to be done math on.

1 view (last 30 days)
"lat" should be a double and should be able to be subtracted from 90. How do I make "lat" a double and able to be done math on?
lat = uicontrol('Style','edit','String','0','position',[250 630 100 20],'Callback',(@h_lat));
uicontrol('Style','pushbutton','String','Evaluate','Position',[130,550,100,50],'Callback',{@Evaluate},'BackgroundColor','green');
function h_lat(hObject, eventdata, handles)%#ok
lat = str2double(get(hObject,'String'));
handles = guidata(hObject);
guidata(hObject, setfield(handles,'lat',lat));%#ok
function Evaluate(hObject, eventdata, handles)
handles = guidata(hObject);
lat = handles.lat;
disp(lat);
Theta=(90-lat)*pi/180;
Output:
UIControl (0) with properties:
Style: 'edit'
String: '0'
BackgroundColor: [0.9400 0.9400 0.9400]
Callback: @h_lat
Value: 0
Position: [250 630 100 20]
Units: 'pixels'
Show all properties
Undefined function 'minus' for input arguments of type 'matlab.ui.control.UIControl'.
Error in MagneticFieldFromLonLat>Evaluate (line 64)
Theta=(90-lat)*pi/180;
Error while evaluating UIControl Callback
  3 Comments
Philosophaie
Philosophaie on 29 Apr 2016
Normally this given as "lat" as a double and you can do math on it. Why is it not in this case?
Adam
Adam on 29 Apr 2016
lat = uicontrol('Style','edit','String...
Name that something else for a start.

Sign in to comment.

Answers (0)

Categories

Find more on Graphics Object Programming in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!