Simple column vector - random number question.

Create a column vector of length "num" that consists of random numbers that are uniformly distributed between 2 and 9. (D)

D = randi([2 9],num,1);

D = 2+ 7.*rand(num,1) ;

Why aren't those two true? And what would be the right one?

Answer 1

[James Tursa]

You need to apply the floor() function to rand to get integer results, and your range multiplier isn't quite correct for the range you want. E.g.,

D = 2 + floor(8.*rand(num,1));  % <-- Changed 7 to 8 and added floor() function

[Danny C]

Working! Thank you :)