Normal random number generation

5 views (last 30 days)
Sushant
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?
  1 Comment
Dyuman Joshi
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
I also recommend you check out these comments -

Sign in to comment.

Answers (2)

Torsten
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.
  1 Comment
Dyuman Joshi
Dyuman Joshi on 22 Sep 2022
Quite a neat function.
However, OP might not have access to Stats and ML toolboox.

Sign in to comment.


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

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!