Math Forum / Math Software / MATLAB / July 2008

How to put a default value of the callback if it's not being
called? so that there is always a value even it's not being
used. Like this?
function  answer_nochange_Callback(hObject, eventdata, handles)

In Gui, how do I command the callback function to go to the
next function?
For example, when I first press the button, it will go to this,
function answer_faster_Callback(hObject, eventdata, handles)

I want to know what i have to use in simulink to start with
the modelling of a geyser.

There is a function which yields a certain warning (I know
the warning message id). I would like to catch that warning
and wrap it into a warndlg. How can I "catch" warnings in a
similar fashion to error handling with try catch?

This may be a baisc question but it is causing me a lot of headaches.  When I use the matlab syntax:
i=1:n
j=1:n
k=1:n

Matlab is very slow add/delete a row in a matrix.
It always trying to copy the whole matrix
e.g.,
a = rand(5000);

             Greetings of the day!
I have following doubts in my mind.
1) While training, performance metric is shown in the top
of the graph. What does this signifies.

I am currently working on a project that requires the use of
SimuLINK and xPC Target. The setup right now involves two
computers, one to run the actual MATLAB/SimuLINK files and
the other that has the National Instruments PCI-6025

Is there a way to save a plot such that it doesn’t put up a
plot but saves to a specific file name and location as
a .png file?

I was profiling my code and I found something really odd.
I have a function which is called /billions/ of times during a
simulation (276241 times in my testing example). So I was trying to
focus on optimizing this function to get the code to run faster. After

I am extracting some data from previously made structured
arrays and was wondering if i had multiple data items that
looked like:
Data1 = <1181 x 1>

I have an algorithm that was realized using C++. I wrote a
S-Funciton with this C++ code and it runs off-line in
simulink. But my aim is to use it in a xPC Target Real Time
Application. I could not do that.

is it possible to grab/convert the value in the cell array?
s= {[1 2 3] [3 4 5]}
so that it becomes
s= [1, 2, 3; 3, 4, 5]

I am using MATLAB 2007a, in my ActiveX Control list
Microsoft Flexgrid control is missing. How do i install it ???
Any Help plzzzzz!
Thanks !!

.. the following scenario
I have a transfer function in s-space like H(s)=N(s)/D(s).
Using the function tf2ss provides me a transfer function in
state space form commonly written as: