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Generate rand. data with zero skewness and some kurtosis

Started by Abdul Kudus in Matlab DSP25 years ago 1 reply

Dear all, Right now, I'm doing research about outlier in statistical data (univariate and multivariate) and I want to simulate...

Dear all, Right now, I'm doing research about outlier in statistical data (univariate and multivariate) and I want to simulate its behavior. My problem is : How to generate random data from distribution with zero skewness and some kurtosis values in Matlab ?


Re: Random numbers

Started by Anonymous in Matlab DSP25 years ago

hi, for normally distributed numbers with a standard deviation of 100 and a mean of 0 use a = 100*randn(20,1); for...

hi, for normally distributed numbers with a standard deviation of 100 and a mean of 0 use a = 100*randn(20,1); for evenly distributed numbers between -100 and 100, use a = 200*(rand(20,1)-0.5) ; At 21:54 3/10/2001 +0100, ik wrote: >I a


seed to random number generators

Started by Zeynep Kalaylioglu in Matlab DSP24 years ago

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


density estimation

Started by Anonymous in Matlab DSP24 years ago 1 reply

Dear 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.


Loading many images

Started by Anonymous in Matlab DSP24 years ago 3 replies

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...

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


frequency domain representation of Rayleigh fading simulator in matlab

Started by sreejyothi jonnalagadda in Matlab DSP23 years ago

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


FSK modulation

Started by John in Matlab DSP23 years ago 4 replies

I'tyring to generate a bit stream that will be modulated using an FSK signal. So far what I have is when I plotted the graph what I...

I'tyring to generate a bit stream that will be modulated using an FSK signal. So far what I have is when I plotted the graph what I have is not an FSK signal but a bit stream.... bit = round(rand(1,10)); % bit stream of random 1's and 0's bitperiod = 0.1; %bit period fs


Random number selection

Started by durian_world in Matlab DSP23 years ago 2 replies

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...

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.


Serial Communication PC 2 PC

Started by thiagofalcaobr in Matlab DSP23 years ago 1 reply

Hi, i`m trying to make a communication between two PC`s through serial port. How to do this with matlab. The scene is: ...

Hi, i`m trying to make a communication between two PC`s through serial port. How to do this with matlab. The scene is: The PC#1 generate random data and use the serial port to transmit the data to PC#2 through a serial connection (cross connection), this PC


Gaussian Distribution Power Spectrum

Started by imageprocessingx in Matlab DSP23 years ago

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 walk" power spectrum

Started by imageprocessingx in Matlab DSP23 years ago

Hello, What I'd like to do is simulate receiving a radar signal, accumulating the values (say an array of 40 values), and then ...

Hello, What I'd like to do is simulate receiving a radar signal, accumulating the values (say an array of 40 values), and then perform a power spectrum on this array. Data from the radar is shown to be normally distributed. There are the I and Q parts of the signa


Help Loading Data

Started by Jon in Matlab DSP23 years ago 1 reply

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....

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


?? sample rates more than 100kHz

Started by ravikiran_dn in Matlab DSP23 years ago 2 replies

hi everybody, i am not able to obtain a sampling rate more than 110 kHz using MATLAB or BORLAND C++ 5. If I use more than 1 MHz...

hi everybody, i am not able to obtain a sampling rate more than 110 kHz using MATLAB or BORLAND C++ 5. If I use more than 1 MHz sampling rate, then more and more samples has the same value; getting a random step waveform. If any body knows how to obtain higer sample rates of th


creating correlated 2-D noise?

Started by Rowena Lohman in Matlab DSP23 years ago

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


Re: Periodic Random bit with period n=15

Started by Vipperla Ravi Chander N Rao in Matlab DSP23 years ago

Hi, Giving a linear shift to periodic sequence is equivalent to giving the sequence in one period a circular shift (circshift...

Hi, Giving a linear shift to periodic sequence is equivalent to giving the sequence in one period a circular shift (circshift Note:This will work on columns of a matrix, so make necessary transposes as required). Let the original matrix be called 'a' and the shifted one 'b'.


FFT Zoom Transform

Started by g_rahame in Matlab DSP22 years ago 1 reply

Hi 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


Single Port RAM in matlab

Started by Sanjay in Matlab DSP22 years ago 4 replies

Hi, I want to design a single ported RAM [Random Access Memory] in matlab. The Memory will have address, Data and Write...

Hi, I want to design a single ported RAM [Random Access Memory] in matlab. The Memory will have address, Data and Write Enable as a Input Port. Behaviour is if addr>=0 if WE == 1 X(addr) = din; end Dout <= X(addr);


Frequency division multiplexing

Started by susan_w_burke in Matlab DSP22 years ago

Dear Sir: I am simulating a frequency division multiplexing of K channels. The sources are random integers. The modulation is...

Dear Sir: I am simulating a frequency division multiplexing of K channels. The sources are random integers. The modulation is QPSK. =What kind of lowpass filter shall I use? =How shall I do the frequency shift (expj?) in simulink? Should I do it in frequency domai


randn command

Started by Rene Bartar in Matlab DSP22 years ago 4 replies

This 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


random variable of desired pdf

Started by nammi sairamesh in Matlab DSP21 years ago 16 replies

Hi, 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