AnyLogic provides functions to select a random agent from a given population. These functions are defined in the class Utilities and are global (accessible from each place of model code). You call any function from the list below by typing just its name, without a prefix with the population name: randomWhere( people, p -> p.income > 10000 );
Agent randomWhere( population, condition ) - Returns one randomly selected agent within the given population satisfying the specified condition. If the population is empty, or no agents satisfy the specified condition(s), the function returns null.
Examples: Person wealthyPerson = randomWhere( people, p -> p.income > 10000 );
Person wealthyMan = randomWhere( people, p -> p.income > 10000 && p.sex == MALE );
Here we check two conditions (we use logical AND operator && to tell AnyLogic that both the first AND the second condition should be true). The function returns a randomly selected agent that satisifes both conditions.
Person wealthyYoungMan = randomWhere( people, p -> p.income > 10000 && p.sex == MALE && p.age < 21 );
There is another function, enabling the user to use a custom random number generator instead of the default one:
Agent randomWhere( population, condition, java.util.Random r ) - Similar to randomWhere( population, condition ). Uses the specified custom random number generator to choose the element.