RandomBernoulli ( probability )

Returns random values from a Bernoulli distribution (0 or 1)

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Jeremy Bante

https://github.com/jbante/

Sample input:

List (
RandomBernoulli ( .3 );
RandomBernoulli ( .3 );
RandomBernoulli ( .3 );
RandomBernoulli ( .3 );
RandomBernoulli ( .3 );
RandomBernoulli ( .3 );
RandomBernoulli ( .3 );
RandomBernoulli ( .3 );
RandomBernoulli ( .3 );
RandomBernoulli ( .3 )
)

Sample output:

1
0
1
0
1
0
1
0
0
0

Function definition: (Copy & paste into FileMaker's Edit Custom Function window)

/**
 * =====================================
 * RandomBernoulli ( probability )
 *
 * PURPOSE:
 *		When called repeatedly, RandomBernoulli creates values consistent with a
 *		Bernoulli random variable with probability of "event success" (1) given
 *		by the argument.
 *
 * RETURNS:
 *		A number (0 or 1) representing a random variate from a Bernoulli
 *		distribution with the specified probability.
 *
 * PARAMETERS:
 *		probability: A number, 0 ≤ probability ≤ 1
 *
 * DEPENDENCIES: none
 *
 * HISTORY:
 *		CREATED on 2010-02-05 by Jeremy Bante <http://scr.im/jbante>.
 *
 * REFERENCES:
 *		http://en.wikipedia.org/wiki/Bernoulli_distribution
 * =====================================
 */

Case (
	0 > probability or 1 < probability ; "?";	// parameter is out of range
	Random < probability ; 1;
	/*else*/ 0
)

When called repeatedly, RandomBernoulli creates values consistent with a Bernoulli random variable with probability of "event success" (1) given by the argument.

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RandomBernoulli ( probability )

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