Пример #1
0
 /// <summary>
 /// Returns the one-norm of vector <i>x</i>, which is <i>Sum(abs(x[i]))</i>.
 /// </summary>
 /// <param name="x">
 /// The vector x.
 /// </param>
 /// <returns>
 /// The one-norm of x.
 /// </returns>
 public static double Norm1(DoubleMatrix1D x)
 {
     if (x.Size == 0)
     {
         return(0);
     }
     return(x.Aggregate(BinaryFunctions.Plus, Math.Abs));
 }
Пример #2
0
 /// <summary>
 /// Returns the infinity norm of vector <i>x</i>, which is <i>Max(abs(x[i]))</i>.
 /// </summary>
 /// <param name="x">The vector x.</param>
 /// <returns>The infinity norm of matrix <i>A</i></returns>
 public static double NormInfinity(DoubleMatrix1D x)
 {
     // fix for bug reported by [email protected]
     if (x.Size == 0)
     {
         return(0);
     }
     return(x.Aggregate(Math.Max, Math.Abs));
     //	if (x.Size==0) return 0;
     //	return x.aggregate(cern.Cern.Jet.math.Functions.plus,cern.Cern.Jet.math.Functions.abs);
     //	double max = 0;
     //	for (int i = x.Size; --i >= 0; ) {
     //		max = System.Math.Max(max, x.getQuick(i));
     //	}
     //	return max;
 }
Пример #3
0
 public double Dasum(DoubleMatrix1D x)
 {
     return(x.Aggregate(F2.Plus, F1.Abs));
 }