Generate a random number in a certain range in MATLAB

Question

How can I generate a random number in MATLAB between 13 and 20?

Answer 1

If you need a floating random number between 13 and 20

(20-13).*rand(1) + 13

If you need an integer random number between 13 and 20

floor((21-13).*rand(1) + 13)

Note: Fix problem mentioned in comment "This excludes 20" by replacing 20 with 21

Answer 2

If you are looking for Uniformly distributed pseudorandom integers use:

randi([13, 20])

Answer 3

Generate values from the uniform distribution on the interval [a, b].

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