Math Forum / Math Software / MATLAB / July 2008

I have an optimization problem to find the MLE estimates of a statistical model.  There are certain restrictions on the parameter of the process (i.e. GARCH(1,1,) process) such that the likelihood is well defined.  Since they are linear constraints, there are several ways I can ...

Hi, probably an easy answer to this one.
I have arrays that are 30x200x12 the data in each cell is
a specific location.  I would like to average each cell
and return a 30x200 array of averages.  So far I can only

Matlab provides functionality to send e-mails using the
"sendmail"-function. I'm looking to do something similar
with instant messages.
What I'd like to do is to connect to a google talk server

is it possible to plot a vector
(vector = [1 1 1 2 1 2 1 2 2 2 1 1 1 2 2 1 2 1 2 2 2 1])
in different colors? e.g. if the element == 1 blue and if ==
2 red?

is it possible to delete a Simulink block parameter via a
command in a m-script? Same function as m-command like
using the button with the red cross in the mask parameters
GUI manual.

I am making my first GUI and I want to make it better! Right
now I have separate dialog boxes prompting for all data
entries but I would like to have a full window GUI where the
user can enter all data entries at once. It would also be

I am trying to create a set of code that will automatically
change a matrix to a column vector. An example of what this
looks like can be seen below:
dys=

I'm analysing sound files, and have plotted frequency
against power spectrum. I would like to analyse the peaks
in the file (i.e. the frequencies with higher "powers") to
find out what the strongest frequencies are. Is there any

Are there any functions that allow data to be exported
automatically to a spreadsheet? Any guidance would be of
great help.
Thanks,

Here is the setup.  I have a real fast desktop that has 4gb
ram.  I also have a server machine that has 32gb ram, but is
much slower than the desktop.  I run a lot of matlab code
that would be nice to be fast AND have lots of ram

I have to calculate the Euclidean distance between two 3D
point sets and right now I am using for-loops. As you can
imagine this is rather slow. Is there a faster way to do this?
Thanks in advance.

I really must be losing my mind because i have done this
before but can't rememeber how i did it...
I am looping through data and want to determine if
something passes or fails but i want 'Pass' / 'Fail' to be

I have this popular memory leak:
I put two pointers (both have been allocated previously) in a function ,
after I take some slices of one of them and I put these slices into the other
one but,  I cannot free both later because I can have a memory leak.

How can I link a Database with Matlab GUI. I have to enter
some data to a Database (.mdb file) and recall it later.
Is there amy option. Can I generte a report using data in
the databse?

Hi, I'm wondering if there's a way to return extra (user) output
arguments from ode functions? There are a number of parameters that
I'd like to evaluate for each time-step (not only the primary solution
to the DEQ) but I can't seem to find a way (other than using global