MATLAB: How to assign the value of a variable with push button

matrix

I would like that by pressing a push button it assigns the value of for example u = 1, so that later that value will use it in another button and it can start my program

get(handles.pushbutton1,u=1);
get(handles.pushbutton3,u=2);
get(handles.pushbutton4,u=3);
get(handles.pushbutton5,u=4);
switch u
    case 1
m=[str2double(get(handles.edit3,'string')) str2double(get(handles.edit4,'string'))(str2double(get(handles.edit9,'string'))); str2double(get(handles.edit10,'string')) str2double(get(handles.edit11,'string')) str2double(get(handles.edit15,'string'))];
    case 2
m=[str2double(get(handles.edit3,'string')) str2double(get(handles.edit4,'string')) str2double(get(handles.edit6,'string')) (str2double(get(handles.edit9,'string'))); str2double(get(handles.edit10,'string')) str2double(get(handles.edit11,'string')) str2double(get(handles.edit12,'string')) (str2double(get(handles.edit15,'string'))); str2double(get(handles.edit16,'string')) str2double(get(handles.edit17,'string')) str2double(get(handles.edit18,'string')) str2double(get(handles.edit21,'string')) ];
    case 3
      case 4
      otherwise
      x=0
  end
  if all(size(m)==[2,3])
     h=1
  else
     if all(size(m)==[3,4])
         h=2
     else
         if all(size(m)==[4,5])
             h=3
         else
             if all(size(m)==[5,6])
                h=4
   end
         end
     end
  end
  switch h
      case 1
      m(1,:)=m(1,:)/m(1,1);
      m(2,:)=m(2,:)-(m(2,1))*(m(1,:));
      m(2,:)=m(2,:)/m(2,2);
      m(1,:)=m(1,:)-(m(1,2))*(m(2,:));
      x1=m(1,3)
      x2=m(2,3)
      set(handles.edit35,'string',x1);
      set(handles.edit36,'string',x2);
      case 2
      m(1,:)=m(1,:)/m(1,1);
      m(2,:)=m(2,:)-(m(2,1))*(m(1,:));
      m(3,:)=m(3,:)-(m(3,1))*(m(1,:));
      m(2,:)=m(2,:)/m(2,2);
      m(3,:)=m(3,:)-(m(3,2))*(m(2,:));
      m(3,:)=m(3,:)/m(3,3);
      m(2,:)=m(2,:)-(m(2,3))*(m(3,:));
      m(1,:)=m(1,:)-(m(1,3))*(m(3,:));
      m(1,:)=m(1,:)-(m(1,2))*(m(2,:));
      x1=m(1,4)
      x2=m(2,4)
      x3=m(3,4)
      set(handles.edit35,'string',x1);
      set(handles.edit36,'string',x2);
      set(handles.edit37,'string',x3);
      case 3
          x=3
      case 4
          x=2
      otherwise
          x=32
    end

Best Answer

http://matlab.wikia.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI.28s.29.3F

Related Solutions

MATLAB: ()-indexing must appear last in an index expression What is the mistake? method gauss jordan gui

You can't do the following:

str2double(get(handles.edit4,'string'))(str2double(get(handles.edit9,'string')));

Did you mean to add a space between the terms? If not and you want to access the nth index of this variable, keep reading.

Unlike other languages like JAVA, you can't immediately take the output of str2double and find the value at the nth index. You need to use a temporary variable to do this kind of indexing. See this example:

a = {'1' '2' '3'}
b = '2'
c = str2double(a)(str2double(b)) % Error: ()-indexing must appear last in an index expression.
temp = str2double(a);
c = temp(str2double(b));  %no error. this works.

In your case, any string that will return a matrix should be stored in a temporary matrix.

temp  = str2double(get(handles.edit4,'string'))
value = tempMat(str2double(get(handles.edit9,'string')));

If you have to extract a value using 2 edit text boxes frequently, consider making a simple function like this:

function Value = getValue(Handle1, Handle2)
Values = str2double(get(Handle1, 'string'));
Value = Values(str2double(get(Handle2, 'string')));

And whenever you want to get a value from a edit text box based on the index value of another text box, do this:

getValue(handles.edit4, handles.edit9)

MATLAB: How to tell matlab in a matrix that if the program does not assign value to an element do not fill it with 0

thanks for answering but I solved my problem, when the user presses 2x2 what pushbutton does is declare as symbolic variable au, assign the value of u and save it with setappdata and so with the other buttons, u = 2, u = 3 etc . When you press the solve button I declare the symbolic variable u and I get the value of u according to the point that you pressed with getappdata. next I show you the code

function 2x2_Callback(hObject, eventdata, handles)
syms u
u=1
setappdata (0, 'evalue', u);
function solvethesystem_Callback(hObject, eventdata, handles)
syms u
u = getappdata (0, 'evalue');
switch u 
case 1 
        m=[str2double(get(handles.edit3,'string')) str2double(get(handles.edit4,'string')) (str2double(get(handles.edit9,'string'))); str2double(get(handles.edit10,'string')) str2double(get(handles.edit11,'string')) str2double(get(handles.edit15,'string'))] 
    case 2 
        m=[str2double(get(handles.edit3,'string')) str2double(get(handles.edit4,'string')) str2double(get(handles.edit6,'string')) (str2double(get(handles.edit9,'string'))); str2double(get(handles.edit10,'string')) str2double(get(handles.edit11,'string')) str2double(get(handles.edit12,'string')) (str2double(get(handles.edit15,'string'))); str2double(get(handles.edit16,'string')) str2double(get(handles.edit17,'string')) str2double(get(handles.edit18,'string')) str2double(get(handles.edit21,'string')) ] 
    case 3
         m=[str2double(get(handles.edit3,'string')) str2double(get(handles.edit4,'string')) str2double(get(handles.edit6,'string')) str2double(get(handles.edit7,'string')) (str2double(get(handles.edit9,'string'))); str2double(get(handles.edit10,'string')) str2double(get(handles.edit11,'string')) str2double(get(handles.edit12,'string')) str2double(get(handles.edit13,'string')) (str2double(get(handles.edit15,'string'))); str2double(get(handles.edit16,'string')) str2double(get(handles.edit17,'string')) str2double(get(handles.edit18,'string')) str2double(get(handles.edit19,'string')) (str2double(get(handles.edit21,'string'))); str2double(get(handles.edit22,'string')) str2double(get(handles.edit23,'string')) str2double(get(handles.edit24,'string')) str2double(get(handles.edit25,'string')) str2double(get(handles.edit27,'string')) ] 
    case 4
         m=[str2double(get(handles.edit3,'string')) str2double(get(handles.edit4,'string')) str2double(get(handles.edit6,'string')) str2double(get(handles.edit7,'string')) str2double(get(handles.edit8,'string')) (str2double(get(handles.edit9,'string'))); str2double(get(handles.edit10,'string')) str2double(get(handles.edit11,'string')) str2double(get(handles.edit12,'string')) str2double(get(handles.edit13,'string'))  str2double(get(handles.edit14,'string')) (str2double(get(handles.edit15,'string'))); str2double(get(handles.edit16,'string')) str2double(get(handles.edit17,'string')) str2double(get(handles.edit18,'string')) str2double(get(handles.edit19,'string')) str2double(get(handles.edit20,'string')) (str2double(get(handles.edit21,'string'))); str2double(get(handles.edit22,'string')) str2double(get(handles.edit23,'string')) str2double(get(handles.edit24,'string')) str2double(get(handles.edit25,'string')) str2double(get(handles.edit26,'string')) (str2double(get(handles.edit27,'string'))); str2double(get(handles.edit28,'string')) str2double(get(handles.edit29,'string')) str2double(get(handles.edit30,'string')) str2double(get(handles.edit31,'string')) str2double(get(handles.edit32,'string')) str2double(get(handles.edit33,'string')) ] 
      otherwise
      x=0
  end

Best Answer

Related Solutions

MATLAB: ()-indexing must appear last in an index expression What is the mistake? method gauss jordan gui

MATLAB: How to tell matlab in a matrix that if the program does not assign value to an element do not fill it with 0

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