Varying Random Number Generator between a Range

Hello,

I am trying to vary a random number generator between a range of vectors, this is my code

ub =[1;1;2;2;2;2;2;2;2;2]; 
lb =[0.95;0.96;1.88;1.88;1.85;1.85;1.75;1.75;1.65;1.58]
Y = lb + (ub-lb).*rand(10,1)

The result I am getting is a 10x4 double matrix, I want a 10x1 vector.

What changes I should make?

Answer 1

[KSSV]

lb = [750,150,8,8];
ub = [850,250,15,15];
%
id1 = randperm(length(lb),1) ;   % select 1 lb randomly 
id2 = randperm(length(ub),1) ;   % select 1 ub randomly 
Y = lb(id1) + (ub(id2)-lb(id1))*rand(10,1)

[Chris Dan]

Hi,

thanks for the answer :)

But I want to vary the Y such that the first integer is varying from 850 to 750, the second from 150 to 250, the third from 8 to 15.

Is there any way?

[Stephen23]

"...I want to vary the Y such that the first integer is varying from 850 to 750, the second from 150 to 250, the third from 8 to 15."

That defines the first three values. What about the other seven? (you wrote that you "want a 10x1 vector").

[Bruno Luong]

And what is the range of 5th, 6th ... 10th random numbers? You give 4 bounds but then you want to generate 10 numbers. You need to be more coherent here.

[Chris Dan]

Hi,

sorry for that confusion, I have edited the question :)

[Bruno Luong]

Great so now what is the size of Y?

You just answer your own question I think.

[Chris Dan]

yeap, I guess :)