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I want to generate geometric or Gaussian distributed random numbers without using "geornd" or "randn" functions present in MATLAB library. How can I generate random numbers with those distributions by using only the "rand" function used to generate uniformly distributed random numbers. I want to do this because Uniform distribution is the most basic type distribution and any other distribution can be generated from this distribution. A small code example would be very helpfull..!!

Amro
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Sourav Mondal
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    I don't fully understand your rationale - the `geornd` function (and probably `randn` too) already uses the `rand` function to produce a result - so are you basically saying you just want to re-implement them yourself? – devrobf Aug 19 '13 at 12:04
  • as @ jazzbassrob points out, if you have the stats toolbox check out the code for geornd: `edit geornd` – Buck Thorn Aug 19 '13 at 12:41
  • You may be interested in [this matlab page](http://www.mathworks.com/company/newsletters/articles/normal-behavior.html) explaining the algorithm used for generating normal values (matlab changed the algorithm in v.6). – marsei Aug 19 '13 at 12:47

1 Answers1

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I suppose you can do this:

U = rand(1)
mu = 5;
sigma = 3;
N = mu + sigma * norminv(U,1,1)
Dennis Jaheruddin
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