Thread Subject:

data handling in GUI

hi, here's the problem:

let's say I have 2 buttons. The first 1 generates, say, a KxK matrix of random numbers. The second one takes this matrix as an input variable and, say, multiplies them by 2 (just 4 example). How should I store the output of the 1st callback function, so that it can be taken as an input by the callback of the second button?

Sorry if it was a bit messy.

cheers,

Alex

Hi Alex,

I would use the guide function to create the GUI, with automatic generation of callback functions. Then you can append your matrix to the handles structue, which is automatically input of all callback functions. Don't forget to have "guidata(hObject,handles)" at the end of each callback function.

Uwe

"Alex Ter-Sarkissov" <ater1980@gmail.com> wrote in message <i7pqg0$ih2$1@fred.mathworks.com>...
> hi, here's the problem:
>
> let's say I have 2 buttons. The first 1 generates, say, a KxK matrix of random numbers. The second one takes this matrix as an input variable and, say, multiplies them by 2 (just 4 example). How should I store the output of the 1st callback function, so that it can be taken as an input by the callback of the second button?
>
> Sorry if it was a bit messy.
>
> cheers,
>
> Alex

"Alex Ter-Sarkissov" <ater1980@gmail.com> wrote in message <i7pqg0$ih2$1@fred.mathworks.com>...
> hi, here's the problem:
>
> let's say I have 2 buttons. The first 1 generates, say, a KxK matrix of random numbers. The second one takes this matrix as an input variable and, say, multiplies them by 2 (just 4 example). How should I store the output of the 1st callback function, so that it can be taken as an input by the callback of the second button?
>
> Sorry if it was a bit messy.
>
Callbacks can be local to the function that creates the button. So have a "rndmtx" variable in the workspace of the main GUI function, and create the buttons. You also probably want to create a uitable object so the user can see the data.
When he presses button 1, the callback sets rndmtx to random, and updates the table. When he presses button 2, the callback sets rndmtx to rndmtx .* 2, and again updates the table.

I ended up using
m=rand(m,n);
set(hObject,'Userdata',m) and it worked totally fine

thanks guys

"Malcolm McLean" <malcolm.mclean5@btinternet.com> wrote in message <i7pvbk$5dd$1@fred.mathworks.com>...
> "Alex Ter-Sarkissov" <ater1980@gmail.com> wrote in message <i7pqg0$ih2$1@fred.mathworks.com>...
> > hi, here's the problem:
> >
> > let's say I have 2 buttons. The first 1 generates, say, a KxK matrix of random numbers. The second one takes this matrix as an input variable and, say, multiplies them by 2 (just 4 example). How should I store the output of the 1st callback function, so that it can be taken as an input by the callback of the second button?
> >
> > Sorry if it was a bit messy.
> >
> Callbacks can be local to the function that creates the button. So have a "rndmtx" variable in the workspace of the main GUI function, and create the buttons. You also probably want to create a uitable object so the user can see the data.
> When he presses button 1, the callback sets rndmtx to random, and updates the table. When he presses button 2, the callback sets rndmtx to rndmtx .* 2, and again updates the table.