CFLib.org – Common Function Library Project

Description:
Returns the coefficient of variation for a set of values (entire population). The CV is a measure of relative dispersion and is calculated by dividing the standard deviation by the mean and multiplying the result by 100 to arrive at a percentage.

Return Values:
Returns a simple value

Example:

<CFSET Values="1,2,3,4,5,6,7,8,9,10"> 

  <CFOUTPUT>
  Given <CFIF IsArray(Values)>{#ArrayToList(Values)#}<CFELSE>{#Values#}</CFIF>
  The coefficient of variation for the population is #CVpop(values)#
  </CFOUTPUT>

Parameters:

Full UDF Source:

/**
 * Returns the coefficient of variation for a set of values (entire population).
 * Requires the StdDevPop() and Mean() functions from this library.
 * 
 * @param values      Comma delimited list or one dimensional array of numeric values. 
 * @return Returns a simple value 
 * @author Rob Brooks-Bilson (rbils@amkor.com) 
 * @version 1, July 18, 2001 
 */
function CVpop(values)
{
  Return ((StdDevPop(values)/Mean(values))*100);
}