Math Forum / Math Software / MATLAB / July 2008

Hey all,
   I was monitoring my program, that would parse, analyze,
and save thousands of data files, with windows task manager
and was watching the system cache grow larger and larger in

Could someone explain me the practical difference between these polyfit and lagrangian interpolation?
I was reading in John's blog the conceptual difference
but it seems to me that they do the same thing.
http://blogs.mathworks.com/loren/2008/07/17/interpolating-polynomials/

I am searching for neural network for software reliability
assessment Matlab code with 3 different hidden nodes .I
don't like to use matlab's prepared function beacuse my
learning function is specific like A(t),B(t) ...

a= randperm(6)
I want the "a" to have different number each time, between
1 to 6.  However, by using randperm, it called out all the 6
random numbers at a time, which become a= 1 4 6 2 3 5

I have the following problem:
I want to train a Neural Network (for classification
purposes), weighting the importance to give to each record.
Hi have a dataset D made up of N records, a vector T of

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
clear
X=[234
432

I am trying to use ODE45 with different instances if the
same set of equations and different parameters. How do do
this?
Simple example

The function FACTOR factorizes an integer in primes.
It's deliberate limited for input up to 2^32, and here is
the help line say:
[

I did some searching through some books, and tried in using
matlab still cannot plot the graph. Is there matlab
functions for us to plot step function u(t-to) and ramp
function r(t-to)?

I'm trying to overlap data in a subplot using a for loop,
but after it completes its first loop and returns to the
subplot command, it erases the previous data and generates
a new subplot.  I understand "hold on" doesn't work for sub

I have recently developed a model for a one degree of
freedom system in Simulink. After sending my input force
and my transmitted force to Matlab I take the discrete
Fourier transform of the data. Then I multiply each term by

variable= {1, 5, 7, 0, 23};
value = round(variable*rand);
is there a way to make sure that the random number do not
repeat again so that the "value" is always different?

Stateflow is driving me crazy.  The trigger that activates
a graph will only go on a rising or falling edge, neither
of which occurs until at least one cycle has passed.  I
want the first pass through the logic to happen at t = 0,

Is there a matlab function that can take an array of 0's and 1's and convert it to an array of numbers representing the 0's and 1's?  (ie, convert the 0's and 1's to true binary)
So, for example, each set of 32 1's and 0's would become a 32 bit integer, or whatever data type you ...

I'm testing my ability to implement "fmincon" on a simple Maximum
Likelihood Problem:  estimate the mean/std parameters  (mu,sigma)  of
a Gaussian distribution by minimizing the negative log-likelihood
function.  Let's pretend that the mean (mu) must be a positive number