[Quantproject-developers] QuantProject/b1_ADT/Statistics BasicFunctions.cs,1.5,1.6

[Glauco S. <gla...@us...>]

Update of /cvsroot/quantproject/QuantProject/b1_ADT/Statistics
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv10648/b1_ADT/Statistics

Modified Files:
	BasicFunctions.cs 
Log Message:
- GetSum (for an ICollection) has been added
- GetSimpleAverage (for an ICollection) has been added
- GetVariance (for an ICollection) has been added
- GetStdDev (for an ICollection) has been added

Index: BasicFunctions.cs
===================================================================
RCS file: /cvsroot/quantproject/QuantProject/b1_ADT/Statistics/BasicFunctions.cs,v
retrieving revision 1.5
retrieving revision 1.6
diff -C2 -d -r1.5 -r1.6
*** BasicFunctions.cs	21 Aug 2005 10:09:23 -0000	1.5
--- BasicFunctions.cs	3 Sep 2005 23:53:17 -0000	1.6
***************
*** 22,26 ****
  
  using System;
! using QuantProject.ADT.Statistics;
  
  namespace QuantProject.ADT.Statistics
--- 22,26 ----
  
  using System;
! using System.Collections;
  
  namespace QuantProject.ADT.Statistics
***************
*** 50,54 ****
      }
  		
!     static public  double Sum( float[] data ) 
  		{
  			double sum = 0;
--- 50,54 ----
      }
  		
! 		static public  double Sum( float[] data ) 
  		{
  			double sum = 0;
***************
*** 59,63 ****
  			return	sum;
  		}
!     static public  double SumOfSquares( double[] data ) 
      {
        double sumOfSquares = 0;
--- 59,82 ----
  			return	sum;
  		}
! 		static public double GetSum( ICollection data ) 
! 		{
! 			double sum = 0;
! 			foreach( object obj in data ) 
! 			{
! 				double valueToBeAdded;
! 				try
! 				{
! 					valueToBeAdded =	Convert.ToDouble( obj );
! 				}
! 				catch
! 				{
! 					throw new Exception( "The data collection contains " +
! 						"a data that cannot be converted to double!" );
! 				}
! 				sum += valueToBeAdded;
! 			}
! 			return sum;
! 		}
! 		static public  double SumOfSquares( double[] data ) 
      {
        double sumOfSquares = 0;
***************
*** 79,86 ****
  		}
      
!     static public double SimpleAverage( double[] data ) 
!     {
!       return	BasicFunctions.Sum(data)/data.Length;
!     }
  		
      static public double SimpleAverage( float[] data ) 
--- 98,105 ----
  		}
      
! 		static public double SimpleAverage( double[] data ) 
! 		{
! 			return	BasicFunctions.Sum(data)/data.Length;
! 		}
  		
      static public double SimpleAverage( float[] data ) 
***************
*** 88,92 ****
  			return	BasicFunctions.Sum(data)/data.Length;
  		}
!     static public double Variance( double[] data ) 
      {
        double sum = BasicFunctions.Sum(data);
--- 107,115 ----
  			return	BasicFunctions.Sum(data)/data.Length;
  		}
! 		static public double GetSimpleAverage( ICollection data ) 
! 		{
! 			return BasicFunctions.GetSum( data )/data.Count;
! 		}
! 		static public double Variance( double[] data ) 
      {
        double sum = BasicFunctions.Sum(data);
***************
*** 101,105 ****
  		}
  
!     static public double CoVariance( double[] firstDataVariable,
                                        double[] secondDataVariable ) 
      {
--- 124,138 ----
  		}
  
! 		static public double GetVariance( ICollection data ) 
! 		{
! 			double simpleAverage = BasicFunctions.GetSimpleAverage(data);
! 			double sum = 0;
! 			foreach ( object obj in data )
! 				sum += ( Convert.ToDouble( obj ) - simpleAverage ) * 
! 					( Convert.ToDouble( obj ) - simpleAverage );
! 			return sum / ( data.Count - 1 );
! 		}
! 
! 		static public double CoVariance( double[] firstDataVariable,
                                        double[] secondDataVariable ) 
      {
***************
*** 131,134 ****
--- 164,171 ----
  			return	System.Math.Sqrt(BasicFunctions.Variance(data));
  		}
+ 		static public double GetStdDev( ICollection data ) 
+ 		{
+ 			return	System.Math.Sqrt( BasicFunctions.GetVariance( data ) );
+ 		}
      
      static public double PearsonCorrelationCoefficient( double[] firstDataVariable,