Overload List
| # | Signature | Description |
|---|---|---|
| 1 | TMtxVec *Log2() const; | Log base 2. |
| 2 | TMtxVec *Log2(TMtxVec *X) const; | Calculate the log base 2 for all X elements and store the results in the calling object. |
| 3 | TMtxVec *Log2(int Index, int Len) const; | Calculate the log base 2 for calling object elements [Index]..[Index+Len-1] in-place. |
| 4 | TMtxVec *Log2(TMtxVec *X, int XIndex, int Index, int Len) const; | Calculate the log base 2 for X elements [XIndex]..[XIndex+Len-1] and store the results in the calling object elements [Index]..[Index+Len-1]. |
Overload 1: TMtxVec *Log2() const;
Log base 2.
Remarks:
Calculate the log base 2 for all calling object elements in-place.
Examples
#include "Math387.h"
#include "MtxExpr.h"
using namespace Dew;
using namespace Dew::Math;
void Example()
{
Matrix a;
a.SetIt(2, 2, false, DewArray<double>{ 1.0, 2.0, 4.0, 10.0 });
a.Log2();
Matrix expected;
expected.SetIt(2, 2, false, DewArray<double>{ 0.0, 1.0, 2.0, 3.32192809488736 });
if (!a.IsEqual(expected, 1e-10, TCompare::cmpAbsolute))
throw tException("Matrix.Log2: mismatch");
}#include "MtxExpr.h"
#include "Units.MtxExpr.h"
using namespace Dew;
using namespace Dew::Math;
using namespace Dew::Math::Units::MtxExpr;
void Example()
{
Matrix a, b;
a.SetIt(2, 2, false, DewArray<double>{1, 2, 4, 8});
a.Log2(); //same as:
a = Log2(a);
b = Log2(a); //same as:
b.Log2(a);
}See Also: Matrix::Exp2
Declared in Dew::Math::Matrix · Dew.Math/MtxExpr.h · Cross-compiler
Overload 2: TMtxVec *Log2(TMtxVec *X) const;
Calculate the log base 2 for all X elements and store the results in the calling object.
| # | Name | Type | Description |
|---|---|---|---|
| 1 | X | TMtxVec * |
Remarks:
Size and Matrix::Complex properties of the calling Matrix are set implicitly to match the X object.
Examples
#include "Math387.h"
#include "MtxExpr.h"
using namespace Dew;
using namespace Dew::Math;
void Example()
{
Matrix a;
Matrix x;
x.SetIt(2, 2, false, DewArray<double>{ 1.0, 2.0, 4.0, 10.0 });
a.Log2(x);
Matrix expected;
expected.SetIt(2, 2, false, DewArray<double>{ 0.0, 1.0, 2.0, 3.32192809488736 });
if (!a.IsEqual(expected, 1e-10, TCompare::cmpAbsolute))
throw tException("Matrix.Log2: mismatch");
}Declared in Dew::Math::Matrix · Dew.Math/MtxExpr.h · Cross-compiler
Overload 3: TMtxVec *Log2(int Index, int Len) const;
Calculate the log base 2 for calling object elements [Index]..[Index+Len-1] in-place.
| # | Name | Type | Description |
|---|---|---|---|
| 1 | Index | int | |
| 2 | Len | int |
Remarks:
An exception is raised if Matrix::ConditionCheck is True and array borders are overrun.
Declared in Dew::Math::Matrix · Dew.Math/MtxExpr.h · Cross-compiler
Overload 4: TMtxVec *Log2(TMtxVec *X, int XIndex, int Index, int Len) const;
Calculate the log base 2 for X elements [XIndex]..[XIndex+Len-1] and store the results in the calling object elements [Index]..[Index+Len-1].
| # | Name | Type | Description |
|---|---|---|---|
| 1 | X | TMtxVec * | |
| 2 | XIndex | int | |
| 3 | Index | int | |
| 4 | Len | int |
Remarks:
Size and Matrix::Complex properties of the calling object must be set explicitly. An exception is raised if Matrix::ConditionCheck is True and array borders are overrun.
Declared in Dew::Math::Matrix · Dew.Math/MtxExpr.h · Cross-compiler