generate random numbers in range from (0.8 to 4)

Hi How to generate 20 random numbers in range from (0.8 to 4) Thanks

[Jan]

@Arnab: See Azzi's and Image Analyst's answers, which contains exactly the same.

Answer 1

[Azzi Abdelmalek]

xmin=0.8
xmax=4
n=20
x=xmin+rand(1,n)*(xmax-xmin)

[Csanad Levente Balogh]

Hi!

Will it still have a uniform distribution lake that?

[Steven Lord]

xmin=0.8;
xmax=4;
n = 1e6; % Generating a few more numbers than the original n=20;
x=xmin+rand(1,n)*(xmax-xmin);
histogram(x, 0.8:0.1:4.1)

Looks reasonably uniform to me.

[Image Analyst]

If you want it EXACTLY perfectly uniform (which is doubtful), then you should use linspace() instead of rand().

Answer 2

[Image Analyst]

Did you look in the help? You will see the first example does what you want:

Example 1
Generate values from the uniform distribution on the interval [a, b]:

   r = a + (b-a).*rand(100,1);

[Jan]

Suggesting to read the help text is a very strong idea, because it helps in nearly all future problems also.

Answer 3

[ChristianW]

n = 20;
R = [0.8 4];

z = rand(n,1)*range(R)+min(R)

Answer 4

[Ka Mirul]

Hallo, I have seen a tutorial about "Generating Random Number in Specific Range" at https://www.youtube.com/watch?v=MyH3-ONYL_k and it works. Hope it will help you.