Math Forum / Math Software / MATLAB / July 2008

I like to define funcions (f(w)) so that the smallest
frequency is on the left and the largest is on the right.
So when I use fft to fourier transform this fucion I have to
do it like this:

I have written a class using the 'handle' parent class. I
understand that the default behaivior for derived classes
of this type is that when a copy is made (using the copy
constructor):

There's got to be a simple way to do this. Suppose you have
A and B, with
size(A) = [N 1]
size(B) = [1 T]

I am a beginner in matlab and i seriously need some help.
MY PROBLEM:
 I have a grayscale image(1024 X 1280) of a pyrovalve(a
valve used in rocket engines, looks like a small piston

I want to generate a non-uniform distribution (or random
numbers )whose value varies between 0 & 1, and has a
specified mean and standard deviation. (Soemthing like a
amplitude varying duty cycle varying pulse train with some

I am trying to use the low-level matlab HDF5 functions to create a
extendible dataset. I am mostly converting the code from the
"Introduction to HDF5" (in the section on Extendible Datasets) guide
found at the website: <http://hdf.ncsa.uiuc.edu/HDF5/>

I have a problem with some Fortran mex-files.
On our Linux x86-64 cluster (which runs Matlab R2006b), I
can run mex-files which seem to return sensible results.
However, when I quit the Matlab session using the "exit"

I've just started using MatLab R2007a Student Version on Mac OS X (Tiger) and I
have problems with plots. This code produces very bad looking labels on the
axis (on screen and when printing):
x = [0:10];

I want to be able to view images in a figure window as i update them.
If I run the script:
figure(1)
im=rgb2gray(imread('http://192.168.1.30/goform/video'));

Hi - I'm a newbie so I apologize in advance.
I want to evaluate integrals like:
\int_D p(\vec(r)) exp(i\vec(r) \cdot \vec(q))d\vec(r)
where D is some 3D domain, i.e., its a 3D Fourier transform.

I have a model that I saved a previous version of for
backup purposes.  I made a few changes, such as adding a
PSK modulator rather than inputing the signal from the
MATLAB workspace.  I also added a few mask parameters to a

I am working of 3d representation of molecules and
encountered a problem.
I have 3 points in 3d:
X = (xi,xj,xk) Y = (yi,yj,yk) Z = (zi,zj,zk)

Is there a way to extract the line/curve of intersection
between two isosurfaces (or more generally two patches)?
This would function as a quick and dirty empirical solver
as well as adding the ability to highlight the intersection

I am having trouble loading a user defined colormap into a
gui I am working on.
I have saved the custom colormap, and can load it just
fine into the normal Matlab workspace.

I hope that all is well.
Can you help me with creating plots in Matlab?  I have
some data held in Matlab, and I would like to plot it
several ways.  For example, suppose I want to create