How to convert a string to number in gui

Hi everbody!

So I have a gui. In this GUI, I have an editable textbox, that when I input data in it, I would be expecting an action from a push button. I add the code to make it clearer.

function plot_Callback(~, ~, handles)
% hObject    handle to plot (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
caseselection= get(handles.Cases, 'Value');
typeselection= get(handles.type, 'String');
if caseselection==2 && typeselection=='5'
    cla(handles.axes, 'reset')
    axes(handles.axes)
    time= 0:1:40;
    case1t5= [5	6 9 14 21	30	41	54	69	86	105	126	149	174	201	230	261	294	329	366	405	446	489	534	581	630	681	734	789	846	905	966	1029	1094	1161	1230	1301	1374	1449	1526	1605];
    plot(time,case1t5)
    grid on
title('case1');
xlabel('time')
ylabel('output');
elseif caseselection==2 && typeselection=='10'
    cla(handles.axes, 'reset')
    axes(handles.axes)
    time= 0:1:30;
    case1t10=[5	6	8.580100284	12.54923785	17.81711804	24.32434614	32.02702857	40.89057314	50.88656794	61.99099212	74.18309709	87.44466178	101.7594726	117.1129469	133.4918511	150.8840853	169.2785149	188.664836	209.033467	230.3754598	252.6824255	275.9464732	300.160157	325.316432	351.4086155	378.4303537	406.3755931	435.2385548	465.0137125	495.6957722	527.2796551];
plot(time,case1t10)
grid on
title('case1');
xlabel('time')
ylabel('output');

the problem pops up with the second condition.

Thx!

[dpb]

What problem is that? Your code is just plotting fixed data...doesn't have anything to do w/ a text box.

BTW, you're labelling both cases "case1" altho that's a nit...

[Aser Zidan]

there is a textbox, which has the tag 'type' not shown tho, where I put the type number in, which when I hit the button it plots that data.

I get this error msg btw,

Operands to the || and && operators must be convertible to logical scalar values.

Answer 1

[dpb]

Aha! OK, now I see the problem...indeed, '10' is a 1x2 char array and so it is a vector and the short-circuit logical operators can only operate on scalars. I didn't notice that originally....was thinking of the result of the textbox as being a set of values trying to return and the data vectors were all constants. Anyway--for your case you need something like

caseselection==2 && str2num(typeselection)==10

for the logic expressions...if caseselection is also from a textbox or other gui component that returns string result instead of numeric, it needs the conversion first, too, of course.

[Aser Zidan]

Actually it worked!, thanks alot