/// <summary>
/// Calculate the variance
/// </summary>
/// <param name="data"></param>
/// <returns></returns>
static public ComplexD Variance( ComplexD[] data ) {
Debug.Assert( data != null );
if( data.Length == 0 ) {
throw new DivideByZeroException( "length of data is zero" );
}
return ComplexStats.SumOfSquares( data ) / data.Length - ComplexStats.Sum( data );
}
/// <summary>
/// Calculate the standard deviation
/// </summary>
/// <param name="data"></param>
/// <returns></returns>
static public ComplexD StdDev( ComplexD[] data ) {
Debug.Assert( data != null );
if( data.Length == 0 ) {
throw new DivideByZeroException( "length of data is zero" );
}
return ComplexMath.Sqrt( ComplexStats.Variance( data ) );
}
/// <summary>
/// Calculate the mean (average)
/// </summary>
/// <param name="data"></param>
/// <returns></returns>
static public ComplexD Mean( ComplexD[] data ) {
return ComplexStats.Sum( data ) / data.Length;
}