TMtx::Sum Method

Overload List

#	Signature	Description
1	double Sum();	Sums vector values.
2	double Sum(int Index, int Len);	Returns the sum of calling object elements [Index]..[Index+Len-1].
3	void Sum(double &ASum, int Index, int Len);	Calculates the sum of calling object elements [Index]..[Index+Len-1].
4	void Sum(TCplx &ASum);	Calculates the sum of all calling object complex elements.
5	void Sum(TCplx &ASum, int Index, int Len);	Calculates the sum of calling object complex elements [Index]..[Index+Len-1].

Overload 1: double Sum();

Sums vector values.

Returns: the sum of all calling object elements. An exception is raised if calling object TMtx::Complex property is true.

Examples

#include "MtxVec.h"
#include "Units.MtxVec.h"

using namespace Dew;
using namespace Dew::Math;
using namespace Dew::Math::Units::MtxVec;

void Example()
{
    TVec* a;
    CreateIt(a);
    a->SetIt(false, DewArray<double>{1, 3, -2});
    double s = a->Sum();  // s = 2
    FreeIt(a);
}

#include "MtxExpr.h"
#include "Units.Math387.h"

using namespace Dew;
using namespace Dew::Math;
using namespace Dew::Math::Units::Math387;

void Example()
{
    Vector a;
    a.SetIt(DewArray<double>{ 1.0, 2.0, 3.0, 4.0 });
    double result = a.Sum();
    if (Abs(result - 10.0) > 1e-10)
        throw tException(DewString("Vector.Sum: expected 10.0, got ") + SampleToStr(result));
}

See Also: TMtx::Sumc