Math Forum / Math Software / MATLAB / July 2008

I'm using a PixeLINK firewire camera to acquire images.  The
resolution is set at 1600x1200 and makes my computer freeze.
In the PixeLINK OEM capture software, I can set a hardware
decimate that reduces the pixels acquired by 2 (skips every

Hi, I have been running experiments using Matlab and inside
my experiment I use the randsample function to, hopefully,
randomize the order of stimuli in the experiment. I noticed
that some orders came up repeatedly. After using the

  I have some questions in mind using IFFT or FFT from
matlab.
For example, I have 1600 points of data (not symmetrical
waveform).

I need to do a 3D plot but having trouble with the meshgrid function.
The data structure is quite simple, I import a 100 row by 50 column matrix. Each value in this matrix is a respective amplitude value.
So imagine a 3-axis plane, the x axis would have 50 values, y axis would have ...

I'm trying to receive real-time data from both serial and
UDP connection simultaneously for about 7 minutes. Even
though the 3GB switch is already turned on, the virtual
memory is properly set and the data is pre-allocated, I

I am using SimMechanics.  I have the system set up so that
when my simulation finishes, an animation is saved as an
AVI file.  However, when I run the simulation with
Simulink’s Rapid Accelerator, the feature to save the

pls, i need your assistance on this topic. i have a signal
and need to apply low pass filter to it. how do i do that?
The signal is actually a power spectrum in homomorphic
signal processing which requires a rectangular window filter.

Is there  any codes or toolbox that could perform
numerical integration and differentation accuartely on 2D
planar geometries. (Not necessarily rectangular, I have a
circular hole in cyclinder)

What is Personal License Password (PLP) of my account

dearstudent i am  looking for code in matlab to use peti
net in classfication

Hi, I asked about this a little while ago, but now I have a
specific direction.  I'm trying to make density contours
based on the density of points in a scatter plot.  I want to
do this by making a grid, then making the contours based on

when ever I try to execute the program below it gives the
following message:
--------
??? Attempted to access ev(1,3); index must be a positive

I've justed switched to Vista64 bit and installed the R2008a
64bit Version, and am now setting up the system again.
I used to have a dualboot system with Linux, where
integrating compilers in Matlab wasnt a problem.

fill=[     0     0     0     0    -1    -1    -1;
    0     0     1     0     0    -1    -1;
    0     1    -1     1     0     0    -1;
    0     1    -1     1     0     0     0;

Why is not thesimulink block handle included in the "block"
input to level 2 mfile?
I know find_system command can get handles, but it would be
nice to have the handle directly.