## Forums Search for: Random

## Loading many images

inhi, I have around 1000 images which I need to load in to matlab and do some operations on. The problem is that the images have...

hi, I have around 1000 images which I need to load in to matlab and do some operations on. The problem is that the images have random names without any order. Any suggestions on how I could read them in to matlab? thanks mehdi

## Poisson distribution

inI would like to generate random numbers with poisson distribution. Is anyone having any reference to this program. (without using...

I would like to generate random numbers with poisson distribution. Is anyone having any reference to this program. (without using Comm toolbox). hari _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail

## Power Spectral Density

inDear All, I am really strugling to write a nice program giving me the curve of the PSD of a random data. If I use the FFT function I will...

Dear All, I am really strugling to write a nice program giving me the curve of the PSD of a random data. If I use the FFT function I will get a descreat representation and not smooth and continues like I found in some publication. Could any one help me with some matlab code to plot a continues PSD. Thanks very much regards

## Gaussian Distribution Power Spectrum

I'm trying to plot the power spec of a set of normally distributed random values. I'm told it should look like a straight line. ...

I'm trying to plot the power spec of a set of normally distributed random values. I'm told it should look like a straight line. However, I'm not seeing this. I'm seeing a 'spike' at the beginning, or at the end, depending on the shift. Any thoughts? As you can see, I'm a begin

## random variable of desired pdf

inHi, I am modelling a wireless channel, I want to model the channel as mixture of two guassians which is suitable for my...

Hi, I am modelling a wireless channel, I want to model the channel as mixture of two guassians which is suitable for my applications. i.e. f= a*f1+b*f2; where f is the pdf of the noise signal. f1 and f2 are gaussian pdfs with mean 0 and variance =1, a and b a

## randn command

inThis command generates a normaly distributed random number with zero mean and variance equals to 1. How do I modify the variance...

This command generates a normaly distributed random number with zero mean and variance equals to 1. How do I modify the variance of the command? thanks Rene Bartar __________________________________________________________________________ Acabe com aquelas j

## density estimation

inDear Group. I have two problems: 1) How can I do multi-variate density estimation in Matlab? 2) How can I then take...

Dear Group. I have two problems: 1) How can I do multi-variate density estimation in Matlab? 2) How can I then take random draws based on the estimated density function? Any help is greatly appreciated. Thank you for your time.

## Removings spikes in a data set

inHi, I am wondering is there any way to remove random spikes in the data.? If someone can help me I can send out a sample of my data set. Your...

Hi, I am wondering is there any way to remove random spikes in the data.? If someone can help me I can send out a sample of my data set. Your help is highly regarded Thanks Thisara

## FFT Zoom Transform

inHi all Has anyone implemented the 'FFT Zoom Transform' in a m-code function? (ref. pg434 in 'Random Data: Analysis and...

Hi all Has anyone implemented the 'FFT Zoom Transform' in a m-code function? (ref. pg434 in 'Random Data: Analysis and Measurement Procedures' By J.S Bendat). Regards Graham

## frequency domain representation of Rayleigh fading simulator in matlab

How to generate complex gaussian random variables for each of N/2 positive frequency components od noise source In Matlab ...

How to generate complex gaussian random variables for each of N/2 positive frequency components od noise source In Matlab

## matrix preallocation

inHello, Can someone please show me how to optimize this bit of code in matlab. I get a warning saying, \"consider preallocating \'rect\' for...

Hello, Can someone please show me how to optimize this bit of code in matlab. I get a warning saying, \"consider preallocating \'rect\' for speed\". and the code is taking a loong time to execute. %-------------------------------------------------------------- samples = 36; m = randsrc(1,10000); % produces random -1\'s and 1\'s. rect = []; % make empty matrix to store for i = 1:length(m)...

## Re: mfr models for image segmentation

Abdulkadir, Nope I do not have any code for markov random fields. I am forwarding this email to Matlab group may be someone...

Abdulkadir, Nope I do not have any code for markov random fields. I am forwarding this email to Matlab group may be someone from there mite be able to help you Hope this helps Tarang On Tue, 22 Mar 2005 03:18:14 -0800 (PST), abdulkadir s

## seed to random number generators

Hi all I have started using Matlab very recently and I like it a lot. I want to set the seed at a fixed value so that I will...

Hi all I have started using Matlab very recently and I like it a lot. I want to set the seed at a fixed value so that I will have same data sets generated by weibrnd and binornd whenever I run the program. I couldn't find a way to assign a value to the seed before I call weibr

## QPSK or BPSK for ZF equalization

Hi all!! I implemented in Matlab some different ZF equalizations, but I should change the input signal froma random [+1/-1] signal to a QPSK...

Hi all!! I implemented in Matlab some different ZF equalizations, but I should change the input signal froma random [+1/-1] signal to a QPSK or BPSK signal (choosing number of samples, oversampling and so on..), but I have no idea of how doing it. Could anyone give me some advices or some code-examples? Thank you all in advance, Ella PS:here there

## mrf based segmentation

hi all, i am working on image compression, i have encountered a problem while implementing mrf for image segmentation. Could anyone of u...

hi all, i am working on image compression, i have encountered a problem while implementing mrf for image segmentation. Could anyone of u help me by suggesting any link or code source for image segmentation using Markov Random Fields. Please help me. Thanks in advance sonali

## Pareto and Zipf distribution

Hi, there, Has anyone implemented Pareto and Zipf distributions? I want to have the random number generator, pdf and cdf and...

Hi, there, Has anyone implemented Pareto and Zipf distributions? I want to have the random number generator, pdf and cdf and inv-cdf of them. THanks for any information. --James

## Random number selection

inDear all, I would like to select a number of entries from a fix set. Say i want to select 4 numbers from the set [1 45 26 987...

Dear all, I would like to select a number of entries from a fix set. Say i want to select 4 numbers from the set [1 45 26 987 25 97 65 89 46]. One possible result can be [56 987 65 46]. How can I achieve that? Thanks in advance! J.Y.

## Simulating

I am using an AR model to estimate a noise sequency, I should be able to simulate a longer sequency of the noise. I have tried to use ...

I am using an AR model to estimate a noise sequency, I should be able to simulate a longer sequency of the noise. I have tried to use predict command, but the sequency looks different. I have also tried too use a long random noise sequency and used that with the model, but then frequencies don't match. Is there any methhod I could solve this problem,

## creating correlated 2-D noise?

I need to create noise on a 2-D grid, say: [x,y]=meshgrid(-100:100,-100:100); where I can set the correlation length. I know...

I need to create noise on a 2-D grid, say: [x,y]=meshgrid(-100:100,-100:100); where I can set the correlation length. I know that I need to take random noise and then filter it somehow, but I don't know how to do that. I've been reading the matlab help files, but it loo

## Help Loading Data

inI have a data file that I'd really like to load into matlab because it is very convient for me to do the analysis in matlab....

I have a data file that I'd really like to load into matlab because it is very convient for me to do the analysis in matlab. Normally between textread and load I don't have a problem doing this, but this file contains 'random' strings every once in a while. Most of the file is number