Math Forum / Math Software / MATLAB / July 2008

I am using fminunc to minimize a two dimensional (x and y)
linear function.
My question is what stepize (i.e. unit vector) does fminunc
use when going away from the initial position that I give it?

I'm working on a block of code that measures the distance
between every point within a volume to a set of predefined
existant in the same volume.
Basically I'm interested in how far any given volume element

Hello,
Can someone tell me how to delete a semicolon at the end of
each line in my text file.
thanks

function pushbutton9_Callback(hObject, eventdata, handles)
if handles.randValue <=5
;
else

I've written a program to read in several files, compute
certain aspects of each data set, eg std dev, var, etc, and
then write them to graphs
What I'd like to do now is somehow combine the data from

Suppose I have four column arrays "one," "two," "three," and
"four." Each array contains 500 scalar values. How can I say:
If any one of these scalar values are equal to zero then
execute the following code.

I have a sample of scatter points (see image in link below)
and I need to determine the points that lie on the edge
contour. The convex hull is not "tight" enough around the
data. Has anyone run into a script or algorithm that can do

[audio, fs] = wavread('F:\audio.wav');
samples{6} = {audio, fs};
[audio, fs] = wavread('F:\audio.wav');
samples{10} = {audio, fs};

I know that there's a matlab function nnz which will help to
detect the number of non zero element, may i know is there a
function in mablab to detect the number of zero? Thanks a lot!

I have a problem with the following ODE system:
C*dx(t)/dt=A-B*x(t)-y(t)
where A,B and C are constants.
Furthermore I have data from measurements representing x(t).

A simple questio, when you use the function rectangle, how
can i change the color of the rectangle?? For example
instead of black red

I'm coding my own FEM code in Matlab and want to implement
the so-called substructuring technique, which basically is a
static condensation.
However Matlab runs out of memory quiet fast. As soon as I

Is it possible to make the different lines of text in a
listbox style UICONTROL different colors?
cdata doesn't seem to do anything and backgroundcolor only
accepts a single 3-matrix RGB value.

Dear all I want to ask if it is possible to produce an inp
file from Matlab and then export to ABAQUS so as to
recognize the geometry.
Thanks in advanced

Can anyone suggest a better way to do the following?  I
want a pixel list (x,y), not linear indices, of a region in
an image specified by a bounding box ... Below is a for-
loop sort of brute force approach, but I get the impression