Random Numbers Within a Specific Range
This example shows how to create an array of random floating-point numbers that are drawn from a uniform distribution in the open interval (50, 100).
rand returns normalized values (between 0 and
1) that are drawn from a uniform distribution. To change the range of the
distribution to a new range, (a, b),
multiply each value by the width of the new range, (b –
a) and then shift every value by
First, initialize the random number generator to make the results in this example repeatable.
Create a vector of 1000 random values. Use the
function to draw the values from a uniform distribution in the open interval,
a = 50; b = 100; r = (b-a).*rand(1000,1) + a;
Verify the values in
r are within the specified
r_range = [min(r) max(r)]
r_range = 50.0261 99.9746
The result is in the open interval, (50,100).
Some combinations of a and b make it theoretically possible for your results to include a or b. In practice, this is extremely unlikely to happen.