MATLAB: Normally random number generator with limited zone

duplicate post requiring mergingnormal distribution -random number generator

tnx in advance, i have 3 random variables.that every of that 3 related to a another(*) one(of course)its random too.i use normal distribution generator for monte carlo simulation in matlab to produce RAndom number.but in some cases with mention to unlimited zone of generating random number my final data(*)will be negative.that is not accurate and unexplainable for my job(bearing capacity-geotechnical eng.)i choose normally dist. because its the best match for my data and bell type format of its distribution also help me and i have to use it..also i need to generate positive random number with this normal dist.i think i should find a way to limit this generator to produce random number between -1 & 1 or even find a way to use this distribution with desirable mean and standard deviation..

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This function will generate a normal distribution conditional by bounds:

http://www.mathworks.com/matlabcentral/fileexchange/23832-truncated-gaussian

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MATLAB: Hi – please what is the difference between normrnd and randn

1. what is the difference between normrnd and randn?

doc normrnd
 r = normrnd(mu,sigma) generates a random number from the normal distribution with mean
 parameter mu and standard deviation parameter sigma.
doc randn
 X = randn returns a random scalar drawn from the standard normal distribution.

"Standard normal distribution" is a mean of 0.0 and a standard deviation of 1.0 . This means:

normrnd(mu, sigma) = randn * sigma + mu

2. How to use normrnd to generate random numbers from normal distribution with specific mean and variance ?

Simply by calling: normrnd(mu, sigma)

Remember that normrnd uses the standard deviation, which is the square root of the variance.

Do you know the doc and help commands? You find the documentation of the current Matlab version online also: https://www.mathworks.com/help/index.html

MATLAB: What is the difference between mvnrnd and normrnd

mvnrnd() is the function used to generate pseudo random numbers that follow multi variate normal distribution. mvnrnd() is more for creating correlated random variables normrnd() is the function used to generate pseudo random numbers that follow normal distribution. normrnd() is generally faster than mvnrnd(). For more information on mvnrnd() and normrnd() follow the documentation http://www.mathworks.com/help/stats/mvnrnd.html

http://www.mathworks.com/help/stats/normrnd.html

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MATLAB: Hi – please what is the difference between normrnd and randn

MATLAB: What is the difference between mvnrnd and normrnd

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