how can i assign few different calculation for a single pusshbutton

Question

hardip 2013-7-19

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https://ww2.mathworks.cn/matlabcentral/answers/82563-how-can-i-assign-few-different-calculation-for-a-single-pusshbutton

hye. i have to design a program to calculate the Op-amp circuits's Voltage gain.here is a brief idea of how this program should be. when the user initiates the program, there will be a popupmenu (with three different choices or types of circuits), three edit_text inputs and a calculate_pushbutton. user selects the type of circuit in the popupmenu and keys in the 3 different values example like A B C. hw can i program the code below to have it calculate the values using different formulas with respect to the circuit type. example like if the user selects circuit one and keys in the value the calculate_pushbutton should calculate using the formula A/B. and if user selects circuit 2, A*C. i have done the program to get data from user in the edit_Text. and also a reset button. but now the problem is how can i assign three different formulas in the calculate_pushbutton. below is the codings i made to calculate. but it doesnt work.

switch get(handles.popupmenu,'Value')

 case 1
         A = get(input1_editText,'String');
         B = get(input2_editText,'String');
         C = get(input3_editText,'String'));
         total = str2num(A)/str2num(B);
         answer=num2str(total);
         set(handles.answer_staticText,'String',answer;
     case 2
          A = get(input1_editText,'String');
         B = get(input2_editText,'String');
         C = get(input3_editText,'String'));
         total = str2num(A)*str2num(C);
         answer=num2str(total);
         set(handles.answer_staticText,'String',answer;
         set
     otherwise
 end

thank you for your help

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Answer 1

nl2605 2013-7-19

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/82563-how-can-i-assign-few-different-calculation-for-a-single-pusshbutton#answer_92232

在 MATLAB Online 中打开

In the callback function of the Push Button, you can use val = get(handles.popupmenu,'Value') and then use an if else statement like:

if val==1

A = get(input1_editText,'String');

B = get(input2_editText,'String');

total = str2num(A)/str2num(B);

elseif val==2

 A = get(input1_editText,'String');
C = get(input3_editText,'String');
total = str2num(A)*str2num(C);

and so on.. Hope this helps!

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hardip 2013-7-19

在 MATLAB Online 中打开

i tried the codes that u have mentioned. this is how my code for the popupmenu looks like:

 switch get(handles.popupmenu1,'Value')
    case 1 
        set(handles.calculate_pushbutton,'Value');
    case 2
        set(handles.calculate_pushbutton,'Value');
    case 3
        set(handles.calculate_pushbutton,'Value');
    otherwise
 end

and this is the code for the calculate pushbutton. (i edited the previous inputs with the original one). i still cun run it.

 val = get(handles.popupmenu,'Value')
 if val==1
     Ve = get(input1_editText,'String');
     Vc = get(input2_editText,'String');
     Vb = get(input3_editText,'String');
     total = str2num(Vc)/str2num(Vb);
     answer=num2str(total);
 elseif val==2
     Ve = get(input1_editText,'String');
     Vc = get(input2_editText,'String');
     Vb = get(input3_editText,'String');
     total = str2num(Ve)/str2num(Vb);
     answer=num2str(total);
 else val==3
     Ve = get(input1_editText,'String');
     Vc = get(input2_editText,'String');
     Vb = get(input3_editText,'String');
     total = str2num(Ve)/str2num(Vc);
     answer=num2str(total);

thank u for your help..

hardip 2013-7-19

plus how can i show the answer? i have one statictext output.. answer_staticText

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Answer 2

nl2605 2013-7-19

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/82563-how-can-i-assign-few-different-calculation-for-a-single-pusshbutton#answer_92238

http://www.mathworks.de/de/help/matlab/creating_guis/program-the-simple-guide-gui.html?s_tid=doc_12b#f3-1000605

Follow this link to use pop up menus the right way.

It should work.

Also, if you want to dispay data in static text use:

set(handles.statictext,'String',answer);

Hope this helps.

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hardip 2013-7-19

在 MATLAB Online 中打开

thank u for ur help. i really appreciate it. by i cant seem to press the calculate button. i mean it doesnt work. i keep getting error. the calculation code i have programmed is

 % --- Executes on button press in calculate_pushbutton.
function calculate_pushbutton_Callback(hObject, eventdata, handles)
% hObject    handle to calculate_pushbutton (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
 val = get(handles.popupmenu,'Value');
 if val==1
     Ve = get(input1_editText,'String');
     Vc = get(input2_editText,'String');
     Vb = get(input3_editText,'String');
     total = str2num(Vc)/str2num(Vb);
     answer=num2str(total);
     set(handles.answer_staticText,'String',answer);
 elseif val==2
     Ve = get(input1_editText,'String');
     Vc = get(input2_editText,'String');
     Vb = get(input3_editText,'String');
     total = str2num(Ve)/str2num(Vb);
     answer=num2str(total);
     set(handles.answer_staticText,'String',answer);
 else val=3;
     Ve = get(input1_editText,'String');
     Vc = get(input2_editText,'String');
     Vb = get(input3_editText,'String');
     total = str2num(Ve)/str2num(Vc);
     answer=num2str(total);
     set(handles.answer_staticText,'String',answer);
 end