TVec::ArcTan Method

TVec Class

Overload List

#SignatureDescription
1TMtxVec *ArcTan();Inverse tangens.
2TMtxVec *ArcTan(int Index, int Len);Calculate the inverse tangens of calling object elements [Index]...[Index+Len-1] in-place.
3TMtxVec *ArcTan(TMtxVec *X);Calculate the inverse tangens of all X object elements.
4TMtxVec *ArcTan(TMtxVec *X, int XIndex, int Index, int Len);Calculate the inverse tangens of X object elements [XIndex]...[XIndex+Len-1].

Overload 1: TMtxVec *ArcTan();

Inverse tangens.

Remarks:

Calculate the inverse tangens for all calling object elements in-place. The return values are expressed in radians.

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

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

void Example()
{
    TMtx *A, *B;
    CreateIt(A, B);
    A->SetIt(2, 2, true, DewArray<double>
        {1, 0, 2, 0,
            2, 0, 4, 1});  // 2x2, complex matrix
    B->ArcTan(A);
    FreeIt(A, B);
}
#include "Math387.h"
#include "MtxExpr.h"

using namespace Dew;
using namespace Dew::Math;

void Example()
{
    Vector a;
    a.SetIt(DewArray<double>{ 0.0, 0.5, 1.0, 2.0 });
    a.ArcTan();
    Vector expected;
    expected.SetIt(DewArray<double>{ 0.0, 0.463647609000806, 0.785398163397448, 1.10714871779409 });
    if (!a.IsEqual(expected, 1e-10, TCompare::cmpAbsolute))
        throw tException("Vector.ArcTan: mismatch");
}
See Also: TVec::Tan, TVec::ArcCot, TVec::ArcTan2
Declared in Dew::Math::TMtxVec · Dew.Math/AbstractMtxVec.h · Cross-compiler

Overload 2: TMtxVec *ArcTan(int Index, int Len);

Calculate the inverse tangens of calling object elements [Index]...[Index+Len-1] in-place.

#NameTypeDescription
1Indexint
2Lenint
Remarks:

An exception is raised if array borders are overrun.

Declared in Dew::Math::TMtxVec · Dew.Math/AbstractMtxVec.h · Cross-compiler

Overload 3: TMtxVec *ArcTan(TMtxVec *X);

Calculate the inverse tangens of all X object elements.

#NameTypeDescription
1XTMtxVec *
Remarks:

Store the results in the calling object. Size and TVec::Complex properties of calling object are adjusted automatically.

Examples
#include "Math387.h"
#include "MtxExpr.h"

using namespace Dew;
using namespace Dew::Math;

void Example()
{
    Vector a;
    Vector x;
    x.SetIt(DewArray<double>{ 0.0, 0.5, 1.0, 2.0 });
    a.ArcTan(x);
    Vector expected;
    expected.SetIt(DewArray<double>{ 0.0, 0.463647609000806, 0.785398163397448, 1.10714871779409 });
    if (!a.IsEqual(expected, 1e-10, TCompare::cmpAbsolute))
        throw tException("Vector.ArcTan: mismatch");
}
Declared in Dew::Math::TMtxVec · Dew.Math/AbstractMtxVec.h · Cross-compiler

Overload 4: TMtxVec *ArcTan(TMtxVec *X, int XIndex, int Index, int Len);

Calculate the inverse tangens of X object elements [XIndex]...[XIndex+Len-1].

#NameTypeDescription
1XTMtxVec *
2XIndexint
3Indexint
4Lenint
Remarks:

The results are stored in calling object elements [Index]...[Index+Len-1]. Size and TVec::Complex properties of the calling object must be set explicitly. An exception is raised if array borders are overrun.

Declared in Dew::Math::TMtxVec · Dew.Math/AbstractMtxVec.h · Cross-compiler