Thread Subject: How can I read input from the keyboard?

Any function for read input from the keyboard?
Thank you

"Shiyuan Gu" <gshy2014@gmail.com> wrote in message
<fsh6cu$kku$1@fred.mathworks.com>...
> Any function for read input from the keyboard?
> Thank you

Yes, gtext will prompt the user to write some text that you
can store to a variable.

Cheers,
Sven.

"Shiyuan Gu" <gshy2014@gmail.com> wrote in message
<fsh6cu$kku$1@fred.mathworks.com>...
> Any function for read input from the keyboard?
> Thank you
Hi
The standard function of MATLAB for reading frpm keyboard is
the function 'input'. There is still another function 'inp'
in the collection of users' function File Exchange. It
enables to preset default value, which can be changed by
user's input. The function inp may be found at FEX Id. 9033.
Mira

And is there some function reading actual stdin buffer
state? What I need to do is to keep drawing a graph (in a
while(1) loop) and I want to break it when a user pushes
some button.

How to do this- each funciotn I've seen WAITS for a user
action. Is there no single one that just watches the
keyboard buffer state without stopping a running program?

Thanks in advance for your support

"Michal S" <miqba@szczecin.home.pl> wrote in message
<fupckg$ail$1@fred.mathworks.com>...
> And is there some function reading actual stdin buffer
> state? What I need to do is to keep drawing a graph (in a
> while(1) loop) and I want to break it when a user pushes
> some button.
>
> How to do this- each funciotn I've seen WAITS for a user
> action. Is there no single one that just watches the
> keyboard buffer state without stopping a running program?
>
> Thanks in advance for your support


You can use properties of the figure. For instance, try this

figh = figure(...
   'keypressfcn','set(gcbf,''userdata'',1)', ...
   'userdata',0) ;
figure(figh) ;
while ~get(figh,'userdata'),
  plot(rand(10)) ; % some plot function
  drawnow ;
end
 
hth
Jos

Thanks for reply. It may work, but it doesn't solve my
problem at all.

Basicly I do not use plot() (I just wrote it to make it
easier to explain).

What I do is getting data via serial port and filtering it
in Matlab, then I use a freeware oscilloscope software
(http://www.oscilloscope-lib.com/) to draw it. I tried
using build-in Matlab plot functions but it didn't work for
really fast transfers.

Anyway- I need some universal function that'll allow me
stop an endless loop by pressing "anything". It may be a
keyboard button, it may be some part of GUI as well.

I tried to do it various ways, but neither works.

I want to do something like:

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
while(1)
data=fscanf(...);
oscmx(7,[data]); %drawing data
if(keyboard_pressed()) break;
end
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

And that's all!
Like I said -it doesn't have to be a keyboard button. It
can be some GUI stuff, but I'm not familliar with it and
all these callback functions doesn't work like they seem to
 :P (I've got huge problems with passing data in and out of
them- Matlab doesn't have pointers and global variables are
also "not so global" as it should be).

Any ideas?
Thanks in advace

"Michal S" <miqba@szczecin.home.pl> wrote in message
news:fuq8b9$ren$1@fred.mathworks.com...
> Thanks for reply. It may work, but it doesn't solve my
> problem at all.
>
> Basicly I do not use plot() (I just wrote it to make it
> easier to explain).
>
> What I do is getting data via serial port and filtering it
> in Matlab, then I use a freeware oscilloscope software
> (http://www.oscilloscope-lib.com/) to draw it. I tried
> using build-in Matlab plot functions but it didn't work for
> really fast transfers.

I'm guessing you were calling PLOT repeatedly in a loop, yes? Rather than
doing that, you should try SETting the XData and YData of the line whose
handle you generated using PLOT before the loop.

> Anyway- I need some universal function that'll allow me
> stop an endless loop by pressing "anything". It may be a
> keyboard button, it may be some part of GUI as well.

In that case, try this:

http://www.mathworks.com/support/solutions/data/1-15JIQ.html?solution=1-15JIQ

*snip*

--
Steve Lord
slord@mathworks.com

Actually I found something that did the trick. If any would
have similar problems there is a topic with almost
identical case:
http://www.mathworks.com/matlabcentral/newsreader/
view_thread/162844

And tutorial showing how to do that:
http://www.blinkdagger.com/matlab/matlab-gui-tutorial-how-
to-stop-a-long-running-function

Anyway thanks a lot for your support :)