How to generate Zero mean and unit variance

45 Ansichten (letzte 30 Tage)
Dick Rusell
Dick Rusell am 18 Sep. 2014
Kommentiert: the cyclist am 19 Feb. 2021
I'm not sure how to generate 1024 samples of pseudo random numbers with zero mean and unit variance using rand and to verify the results with mean, std, and hist.
  2 Kommentare
the cyclist
the cyclist am 18 Sep. 2014
What distribution do you want? Uniform? Normal? Something else?
Dick Rusell
Dick Rusell am 18 Sep. 2014
I think it is supposed to be uniform.

Melden Sie sich an, um zu kommentieren.

Akzeptierte Antwort

Roger Stafford
Roger Stafford am 18 Sep. 2014
Bearbeitet: Roger Stafford am 18 Sep. 2014
If you want a uniform distribution do this:
n = 1024;
x = sqrt(3)*(2*rand(n,1)-1);
The random variable x will have a statistical mean of 0 and variance of 1. Of course any given n-element sample will deviate from these. These are only the statistically expected values.
  2 Kommentare
senthil vel
senthil vel am 8 Jan. 2019
why sqrt(3)*(2*rand(1024,1)-1)
Marius Hernes Brateng
Marius Hernes Brateng am 20 Okt. 2020
this comes from the definition of variance. Solve this equation for a, get a = sqrt(3).

Melden Sie sich an, um zu kommentieren.

Weitere Antworten (2)

the cyclist
the cyclist am 18 Sep. 2014
Bearbeitet: the cyclist am 18 Sep. 2014
randn(1024,1)
will generate 1,024 normally distributed values from a population with zero mean and unit variance.
  3 Kommentare
soumya dwibedy
soumya dwibedy am 16 Feb. 2021
how to generate 1000 normally distributed values with (2 7 )mean and unit variance
the cyclist
the cyclist am 19 Feb. 2021
It's usually better to post a new question, than a comment on a 6-year-old one (even though this is related). People won't typically see a comment buried in an old post. It was just lucky that I did.
I don't understand what you mean by "(2 7)mean". Did you you mean just "27"?

Melden Sie sich an, um zu kommentieren.


majid
majid am 19 Sep. 2014
Bearbeitet: majid am 31 Mai 2015
it helped me so much...thank you انجام پروژه متلب

Kategorien

Mehr zu Random Number Generation finden Sie in Help Center und File Exchange

Community Treasure Hunt

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

Start Hunting!

Translated by