# Normal random number generation

3 views (last 30 days)
Sushant on 22 Sep 2022
Edited: Torsten on 22 Sep 2022
I want to generate some random numbers which should lie between 0 and 1. Also those values should follow nornal ditribution. Is there any readymade function for it, in MATLAB?
Dyuman Joshi on 22 Sep 2022
Edited: Dyuman Joshi on 22 Sep 2022
You can normalize the data in between 0 to 1, though I am not sure if it will still follow normal distribution or not.
y=randn(1,7)
y = 1×7
-2.3212 -0.6273 -0.4058 0.3280 0.0769 1.5305 -0.0685
y=(y-min(y))/(max(y)-min(y))
y = 1×7
0 0.4398 0.4973 0.6878 0.6226 1.0000 0.5849
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Torsten on 22 Sep 2022
Edited: Torsten on 22 Sep 2022
pd = makedist('Normal');
t = truncate(pd,0,1);
r = random(t,1e6,1);
figure(1)
histogram(r,100)
Or directly:
r = -sqrt(2)*erfinv(rand(1e6,1)*erf(-1/sqrt(2)));
figure(2)
histogram(r,100)
Of course, the random numbers are not normally distributed in the usual sense.
Dyuman Joshi on 22 Sep 2022
Quite a neat function.

Bruno Luong on 22 Sep 2022
Here is an alternatve without stats tbx
X=TruncatedGaussian(-1,[0 1],[1, 1e6]);
histogram(X)