Math Forum / Math Software / MATLAB / July 2008

I have been using the Optimization Toolbox with Matlab 2007.
I just installed 2008a and it seems that nothing from the
toolbox works any more!
An example straight from the help of fminunc:

Is this function limited to axes and uicontrol objects?  I
have annotation objects that I would like to programatically
be able to select, move, and resize.  However, when I set
the ButtonDownFcn callback to 'selectmoveresize', it behaves

helo
anybody can teach me how to program root of nodes by using
matlab
i mean how to link all graph of nodes

I have two graphs:
figure (1)
subplot(2, 1, 1)
x=[1, 3, 5, 7, 9];

how can i merge two graphs from of two simulations onto
common axes?
for one value of a parameter i get one graph on the scope
and for another value i get another graph both of the same

I am new ti Matlab can any one show the code of breaking an Image
into smaller ones say to break an 512 * 512  image into 8*8 smaller
parts on which we need to apply some function.
                                                                Thanks

I would like to update the current Matlab version from 7.4 to 7.6 and to
be able to do that I would need to get hold of the actitivation key. I
have the license number which is easy to obtain by just typing "ver".
However, I have no idea how access the activation key, could ...

I have a binary file and I am trying to read it into a matrix
I used the following commands:
fid=fopen(filename, 'r');
A=fread(fid, filename, 'float');

I have to create an other file the same usborder.mat for my
country.
How can I create and How can I edit file usborder.mat
Thanks for your reading :)

I like to write the equivalent of Matlab's A./B in math. Is there an
expression/notation that can do that?

Hi. Is there a way to have contourf draw its plots without
lines (so it's just the colored regions)? I can't find
a "no line" option as part of LineSpec.
Thanks!

Hi, I am wondering if anyone knows a way to save variable
data while running a Matlab function. My function collects
thousands of raw data points and saves them into a cell
array, which ends up with about 100 cells. Each cell is a

I have a 3d object on a 2d sine wave(or an image), and i
change the view from 0,90 to 0,60, the object remains and
the background disappears. How do i also rotate the
background alongwith the object or what do i do ?

Hi. Hopefully someone here can help me with this obstacle
I'm encountering. I'm trying to draw a contour map (with
the 'contourf' function), but I'd to define the outline of
the entire plot myself.

I am trying to figure out how to effectively label a
colorbar with 15 different strings -- each for 1 different
color increment in the jet colormap, and am having a lot of
trouble.  I have spent a lot of time looking at Matlab help