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Random Integers

This example shows how to create an array of random integer values that are drawn from a discrete uniform distribution on the set of numbers –10, –9,...,9, 10.

The simplest randi syntax returns double-precision integer values between 1 and a specified value, imax. To specify a different range, use the imin and imax arguments together.

First, initialize the random number generator to make the results in this example repeatable.

rng(0,'twister');

Create a 1-by-1000 array of random integer values drawn from a discrete uniform distribution on the set of numbers -10, -9,...,9, 10. Use the syntax, randi([imin imax],m,n).

r = randi([-10 10],1,1000);

Verify that the values in r are within the specified range.

r_range = [min(r) max(r)]
r_range =

   -10    10

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