help random numbers generator
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Hi everyone, I'd like to know how to generate a set of random numbers with normal distribution (randn) belonging to a range defined by me.
To make it easier:
I want to generate 10 random numbers between [-0.5 0.5] using randn.
Thanks for your attention
采纳的回答
Jeff Miller
2020-5-25
Good. Here it is as an 'official' answer:
pd = makedist('Normal');
t = truncate(pd,-0.5,0.5);
r = random(t,10,1);
更多回答（1 个）
KSSV
2020-5-23
a = -0.5 ;
b = 0.5 ;
N = 10 ;
r = (b-a).*randn(N,1) + a;
7 个评论
Daniele1
2020-5-23
Jeff Miller
2020-5-24
ummm...that isn't right for normal random numbers, only uniform(0,1). The code given will generate numbers from about -4 to 3 with a mean of -0.5, which is not what the OP was asking for.
Daniele1
2020-5-24
Jeff Miller
2020-5-25
I am not sure exactly what you want to do. One possibility is to just keep generating random numbers with randn until you find 10 in the range you want. Would that work for you?
Daniele1
2020-5-25
Jeff Miller
2020-5-25
If that would work, then I guess this is what you are after:
pd = makedist('Normal');
t = truncate(pd,-0.5,0.5);
r = random(t,10,1);
Daniele1
2020-5-25
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