RandomNormal ( mean ; standardDeviation )

Returns random values from a Normal distribution

Average rating: 4.6 (26 votes) Log in to vote

Jeremy Bante

https://github.com/jbante/

Sample input:

List (
RandomNormal ( 10 ; 5 );
RandomNormal ( 10 ; 5 );
RandomNormal ( 10 ; 5 );
RandomNormal ( 10 ; 5 );
RandomNormal ( 10 ; 5 );
RandomNormal ( 10 ; 5 );
RandomNormal ( 10 ; 5 );
RandomNormal ( 10 ; 5 );
RandomNormal ( 10 ; 5 );
RandomNormal ( 10 ; 5 )
)

Sample output:

12.8121477353090264763
6.80013376037962405065
-.9270458939025267044
15.97839559769003699405
13.3547458035417962665
14.232829181391028885
11.8846139666424785869
15.3922026635464704116
13.93060055013993875615
8.98694383476083344855

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

/**
 * =====================================
 * RandomNormal ( mean ; standardDeviation )
 *
 * PURPOSE:
 *		When called repeatedly, RandomNormal returns values consistent with a
 *		normally distributed random variable with mean and standard deviation
 *		given by the parameters.
 *
 * RETURNS:
 *		A number representing a random variate from a normal distribution with
 *		the specified parameters.
 *
 * PARAMETERS:
 *		mean: The mean for the distribution
 *		standardDeviation: The standard deviation for the distribution
 *
 * DEPENDENCIES:
 *		RandomStandardNormal
 *
 * HISTORY:
 *		MODIFIED on 2011-02-22 by Jeremy Bante to store the Marsaglia polar
 *		method's extra value for later use.
 *		CREATED on 2010-02-22 by Jeremy Bante <http://scr.im/jbante>.
 *
 * REFERENCES:
 *		http://en.wikipedia.org/wiki/Normal_distribution
 * =====================================
 */

standardDeviation * RandomStandardNormal + mean

When called repeatedly, RandomNormal returns values consistent with a normally distributed random variable with mean and standard deviation given by the parameters.

This function is dependent on the RandomStandardNormal function.

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Note: these functions are not guaranteed or supported by BrianDunning.com. Please contact the individual developer with any questions or problems.

RandomNormal ( mean ; standardDeviation )

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