MATLAB Central Newsreader - gui push button

gui push button

Eli Chmouni — Thu, 02 Jul 2009 19:09:02 -0400

I have a gui and i want the code that i need to add to a gui push button to clear all the variables from the workspace.

Re: gui push button

ImageAnalyst — Thu, 02 Jul 2009 19:41:48 -0400

On Jul 2, 3:09 pm, "Eli Chmouni" <echmo...@gmail.com> wrote:
> I have a gui and i want the code that i need to add to a gui push button to clear all the variables from the workspace.

------------------------------------------------------
Which workspace? In addition to the "global" workspace, the callback
function of the button has it's own workspace with its own local
scoped variables. You can use "clear all" to clear these local
variables, but it seems risky since some variables are input arguments
of the callback routine. If you want to delete some variables in the
"global" workspace I think you might have to declare them with the
global command in your callback first so that the "clear" command can
see them. There might be another way that I don't know about though.

Re: gui push button

Nathan — Thu, 02 Jul 2009 19:45:24 -0400

On Jul 2, 12:09 pm, "Eli Chmouni" <echmo...@gmail.com> wrote:
> I have a gui and i want the code that i need to add to a gui push button to clear all the variables from the workspace.

handle = uicontrol('Style','pushbutton','String','Clear',...
'Units','normalized','Position',[.25 .25 .5 .5],'Callback','clear');

It's simpler using GUIDE, but there's some code for you to mess around
with.

-Nathan

Re: gui push button

Eli — Thu, 02 Jul 2009 19:59:10 -0400

On Jul 2, 12:45 pm, Nathan <ngrec...@gmail.com> wrote:
> On Jul 2, 12:09 pm, "Eli Chmouni" <echmo...@gmail.com> wrote:
>
> > I have a gui and i want the code that i need to add to a gui push button to clear all the variables from the workspace.
>
> handle = uicontrol('Style','pushbutton','String','Clear',...
> 'Units','normalized','Position',[.25 .25 .5 .5],'Callback','clear');
>
> It's simpler using GUIDE, but there's some code for you to mess around
> with.
>
> -Nathan

Hello Nathan
yes i am using Guide and i created a push button but i cannot figure
out the code that i need to write in the push button callback . I have
variable values in the matlab workspace and i want to clear them . If
i was using the command window i would just write clear so i need that
code that performs the same operation from a push button in the gui
thx

Re: gui push button

Nathan — Thu, 02 Jul 2009 20:07:34 -0400

On Jul 2, 12:59 pm, Eli <echmo...@gmail.com> wrote:
> On Jul 2, 12:45 pm, Nathan <ngrec...@gmail.com> wrote:
>
> > On Jul 2, 12:09 pm, "Eli Chmouni" <echmo...@gmail.com> wrote:
>
> > > I have a gui and i want the code that i need to add to a gui push button to clear all the variables from the workspace.
>
> > handle = uicontrol('Style','pushbutton','String','Clear',...
> > 'Units','normalized','Position',[.25 .25 .5 .5],'Callback','clear');
>
> > It's simpler using GUIDE, but there's some code for you to mess around
> > with.
>
> > -Nathan
>
> Hello Nathan
> yes i am using Guide and i created a push button but i cannot figure
> out the code that i need to write in the push button callback . I have
> variable values in the matlab workspace and i want to clear them . If
> i was using the command window i would just write clear so i need that
> code that performs the same operation from a push button in the gui
> thx

All you put in the Callback is 'clear'. That is the code. I don't know
what's got you so confused...

Clear is the command. It works in m-files as well as in the command
window.

Give it a try.
-Nathan

Re: gui push button

ImageAnalyst — Fri, 03 Jul 2009 01:29:12 -0400

Again, you need to understand what I responded first. What Nathan
said will only clear the local scope variables that exist ONLY within
that button's callback. It will not clear any other variables in any
other workspace, which means that it won't clear anything in the
global workspace either. I know - I just tested this to verify it. I
put a clear in the callback and it cleared only the local variables
and those in the global workspace remained untouched. If that's what
you want, then fine, you're done, no problem. I just mention this
because it appears that you don't have a complete understanding of
what "workspace" entails.