# Ipopt::DenseVector Class Reference

Dense Vector Implementation. More...

`#include <IpDenseVector.hpp>`

Inheritance diagram for Ipopt::DenseVector:
[legend]

List of all members.

## Public Member Functions
Constructors / Destructors
| DenseVector (const DenseVectorSpace *owner_space)
| Default Constructor.
virtual | ~DenseVector ()
| Destructor.
Additional public methods not in Vector base class.
SmartPtr< DenseVector > | MakeNewDenseVector () const
| Create a new DenseVector from same VectorSpace.
void | SetValues (const Number *x)
| Set elements in the vector to the Number array x.
Number * | Values ()
| Obtain pointer to the internal Number array with vector elements with the indention to change the vector data (USE WITH CARE!).
const Number * | Values () const
| Obtain pointer to the internal Number array with vector elements without the intention to change the vector data (USE WITH CARE!).
const Number * | ExpandedValues () const
| The same as the const version of Values, but we ensure that we always return a valid array, even if IsHomogeneous returns true.
Number * | ExpandedValues ()
| This is the same as Values, but we add it here so that ExpandedValues can also be used for the non-const case.
bool | IsHomogeneous () const
| Indicates if the vector is homogeneous (i.e., all entries have the value Scalar().
Number | Scalar () const
| Scalar value of all entries in a homogeneous vector.
Modifying subranges of the vector.
void | CopyToPos (Index Pos, const Vector &x)
| Copy the data in x into the subrange of this vector starting at position Pos in this vector.
void | CopyFromPos (Index Pos, const Vector &x)
| Copy a subrange of x, starting at Pos, into the full data of this vector.
## Protected Member Functions
Overloaded methods from Vector base class
virtual void | CopyImpl (const Vector &x)
| Copy the data of the vector x into this vector (DCOPY).
virtual void | ScalImpl (Number alpha)
| Scales the vector by scalar alpha (DSCAL).
virtual void | AxpyImpl (Number alpha, const Vector &x)
| Add the multiple alpha of vector x to this vector (DAXPY).
virtual Number | DotImpl (const Vector &x) const
| Computes inner product of vector x with this (DDOT).
virtual Number | Nrm2Impl () const
| Computes the 2-norm of this vector (DNRM2).
virtual Number | AsumImpl () const
| Computes the 1-norm of this vector (DASUM).
virtual Number | AmaxImpl () const
| Computes the max-norm of this vector (based on IDAMAX).
virtual void | SetImpl (Number value)
| Set each element in the vector to the scalar alpha.
virtual void | ElementWiseDivideImpl (const Vector &x)
| Element-wise division .
virtual void | ElementWiseMultiplyImpl (const Vector &x)
| Element-wise multiplication .
virtual void | ElementWiseMaxImpl (const Vector &x)
| Set entry to max of itself and the corresponding element in x.
virtual void | ElementWiseMinImpl (const Vector &x)
| Set entry to min of itself and the corresponding element in x.
virtual void | ElementWiseReciprocalImpl ()
| reciprocates the elements of the vector
virtual void | ElementWiseAbsImpl ()
| take abs of the elements of the vector
virtual void | ElementWiseSqrtImpl ()
| take square-root of the elements of the vector
virtual void | ElementWiseSgnImpl ()
| Changes each entry in the vector to its sgn value.
virtual void | AddScalarImpl (Number scalar)
| Add scalar to every component of the vector.
virtual Number | MaxImpl () const
| Max value in the vector.
virtual Number | MinImpl () const
| Min value in the vector.
virtual Number | SumImpl () const
| Computes the sum of the lements of vector.
virtual Number | SumLogsImpl () const
| Computes the sum of the logs of the elements of vector.
Implemented specialized functions
void | AddTwoVectorsImpl (Number a, const Vector &v1, Number b, const Vector &v2, Number c)
| Add two vectors (a * v1 + b * v2).
Number | FracToBoundImpl (const Vector &delta, Number tau) const
| Fraction to the boundary parameter.
void | AddVectorQuotientImpl (Number a, const Vector &z, const Vector &s, Number c)
| Add the quotient of two vectors, y = a * z/s + c * y.
Output methods
virtual void | PrintImpl (const Journalist &jnlst, EJournalLevel level, EJournalCategory category, const std::string &name, Index indent, const std::string &prefix) const
| Print the entire vector.
void | PrintImplOffset (const Journalist &jnlst, EJournalLevel level, EJournalCategory category, const std::string &name, Index indent, const std::string &prefix, Index offset) const
## Private Member Functions
Number * | values_allocated ()
| Method of getting the internal values array, making sure that memory has been allocated.
void | set_values_from_scalar ()
| Auxilliary method for setting explicitly all elements in values_ to the current scalar value.
Default Compiler Generated Methods
(Hidden to avoid implicit creation/calling). These methods are not implemented and we do not want the compiler to implement them for us, so we declare them private and do not define them. This ensures that they will not be implicitly created/called.
| DenseVector ()
| Default Constructor.
| DenseVector (const DenseVector &)
| Copy Constructor.
void | operator= (const DenseVector &)
| Overloaded Equals Operator.
## Private Attributes
const DenseVectorSpace * | owner_space_
| Copy of the owner_space ptr as a DenseVectorSpace instead of a VectorSpace.
Number * | values_
| Dense Number array of vector values.
Number * | expanded_values_
| Dense Number array pointer that is used for ExpandedValues.
bool | initialized_
| Flag for Initialization.
bool | homogeneous_
| Flag indicating whether the vector is currently homogeneous (that is, all elements have the same value).
Number | scalar_
| Homogeneous value of all elements if the vector is currently homogenous.
## Friends
class | ParVector

## Detailed Description

Dense Vector Implementation.

This is the default Vector class in Ipopt. It stores vectors in contiguous Number arrays, unless the vector has the same value in all entires. In the latter case, we call the vector "homogeneous", and we store only the values that is repeated in all elements. If you want to obtain the values of vector, use the IsHomogeneous() method to find out what status the vector is in, and then use either Values() const or Scalar() const methods to get the values. To set the values of a homogeneous method, use the Set method. To set the values of a non-homogeneous vector, use the SetValues method, or use the non-const Values method to get an array that you can overwrite. In the latter case, storage is ensured.

Definition at line 40 of file IpDenseVector.hpp.

## Constructor & Destructor Documentation

Ipopt::DenseVector::DenseVector | ( | const DenseVectorSpace * | owner_space | ) |

Default Constructor.

virtual Ipopt::DenseVector::~DenseVector | ( |  | ) | `[virtual]`

Destructor.

Ipopt::DenseVector::DenseVector | ( |  | ) | `[private]`

Default Constructor.

Ipopt::DenseVector::DenseVector | ( | const DenseVector & |  | ) | `[private]`

Copy Constructor.

## Member Function Documentation

SmartPtr< DenseVector > Ipopt::DenseVector::MakeNewDenseVector | ( |  | ) | const`[inline]`

Create a new DenseVector from same VectorSpace.

Definition at line 442 of file IpDenseVector.hpp.

void Ipopt::DenseVector::SetValues | ( | const Number * | x | ) |

Set elements in the vector to the Number array x.

Number * Ipopt::DenseVector::Values | ( |  | ) | `[inline]`

Obtain pointer to the internal Number array with vector elements with the indention to change the vector data (USE WITH CARE!).

This does not produce a copy, and lifetime is not guaranteed!.

Definition at line 393 of file IpDenseVector.hpp.

const Number * Ipopt::DenseVector::Values | ( |  | ) | const`[inline]`

Obtain pointer to the internal Number array with vector elements without the intention to change the vector data (USE WITH CARE!).

This does not produce a copy, and lifetime is not guaranteed! IMPORTANT: If this method is currently homogeneous (i.e. IsHomogeneous returns true), then you cannot call this method. Instead, you need to use the Scalar() method.

Definition at line 410 of file IpDenseVector.hpp.

const Number* Ipopt::DenseVector::ExpandedValues | ( |  | ) | const

The same as the const version of Values, but we ensure that we always return a valid array, even if IsHomogeneous returns true.

Number* Ipopt::DenseVector::ExpandedValues | ( |  | ) | `[inline]`

This is the same as Values, but we add it here so that ExpandedValues can also be used for the non-const case.

Definition at line 87 of file IpDenseVector.hpp.

bool Ipopt::DenseVector::IsHomogeneous | ( |  | ) | const`[inline]`

Indicates if the vector is homogeneous (i.e., all entries have the value Scalar().

Definition at line 94 of file IpDenseVector.hpp.

Number Ipopt::DenseVector::Scalar | ( |  | ) | const`[inline]`

Scalar value of all entries in a homogeneous vector.

Definition at line 100 of file IpDenseVector.hpp.

void Ipopt::DenseVector::CopyToPos | ( | Index | Pos,
|  | const Vector & | x |
| ) |  |  |

Copy the data in x into the subrange of this vector starting at position Pos in this vector.

Position count starts at 0.

void Ipopt::DenseVector::CopyFromPos | ( | Index | Pos,
|  | const Vector & | x |
| ) |  |  |

Copy a subrange of x, starting at Pos, into the full data of this vector.

Position count starts at 0.

virtual void Ipopt::DenseVector::CopyImpl | ( | const Vector & | x | ) | `[protected, virtual]`

Copy the data of the vector x into this vector (DCOPY).

virtual void Ipopt::DenseVector::ScalImpl | ( | Number | alpha | ) | `[protected, virtual]`

Scales the vector by scalar alpha (DSCAL).

Implements Ipopt::Vector.

virtual void Ipopt::DenseVector::AxpyImpl | ( | Number | alpha,
|  | const Vector & | x |
| ) |  |  | `[protected, virtual]`

Add the multiple alpha of vector x to this vector (DAXPY).

virtual Number Ipopt::DenseVector::DotImpl | ( | const Vector & | x | ) | const`[protected, virtual]`

Computes inner product of vector x with this (DDOT).

virtual Number Ipopt::DenseVector::Nrm2Impl | ( |  | ) | const`[protected, virtual]`

Computes the 2-norm of this vector (DNRM2).

Implements Ipopt::Vector.

virtual Number Ipopt::DenseVector::AsumImpl | ( |  | ) | const`[protected, virtual]`

Computes the 1-norm of this vector (DASUM).

Implements Ipopt::Vector.

virtual Number Ipopt::DenseVector::AmaxImpl | ( |  | ) | const`[protected, virtual]`

Computes the max-norm of this vector (based on IDAMAX).

Implements Ipopt::Vector.

virtual void Ipopt::DenseVector::SetImpl | ( | Number | value | ) | `[protected, virtual]`

Set each element in the vector to the scalar alpha.

Implements Ipopt::Vector.

virtual void Ipopt::DenseVector::ElementWiseDivideImpl | ( | const Vector & | x | ) | `[protected, virtual]`

Element-wise division .

virtual void Ipopt::DenseVector::ElementWiseMultiplyImpl | ( | const Vector & | x | ) | `[protected, virtual]`

Element-wise multiplication .

virtual void Ipopt::DenseVector::ElementWiseMaxImpl | ( | const Vector & | x | ) | `[protected, virtual]`

Set entry to max of itself and the corresponding element in x.

virtual void Ipopt::DenseVector::ElementWiseMinImpl | ( | const Vector & | x | ) | `[protected, virtual]`

Set entry to min of itself and the corresponding element in x.

virtual void Ipopt::DenseVector::ElementWiseReciprocalImpl | ( |  | ) | `[protected, virtual]`

reciprocates the elements of the vector

Implements Ipopt::Vector.

virtual void Ipopt::DenseVector::ElementWiseAbsImpl | ( |  | ) | `[protected, virtual]`

take abs of the elements of the vector

Implements Ipopt::Vector.

virtual void Ipopt::DenseVector::ElementWiseSqrtImpl | ( |  | ) | `[protected, virtual]`

take square-root of the elements of the vector

Implements Ipopt::Vector.

virtual void Ipopt::DenseVector::ElementWiseSgnImpl | ( |  | ) | `[protected, virtual]`

Changes each entry in the vector to its sgn value.

Implements Ipopt::Vector.

virtual void Ipopt::DenseVector::AddScalarImpl | ( | Number | scalar | ) | `[protected, virtual]`

Add scalar to every component of the vector.

Implements Ipopt::Vector.

virtual Number Ipopt::DenseVector::MaxImpl | ( |  | ) | const`[protected, virtual]`

Max value in the vector.

Implements Ipopt::Vector.

virtual Number Ipopt::DenseVector::MinImpl | ( |  | ) | const`[protected, virtual]`

Min value in the vector.

Implements Ipopt::Vector.

virtual Number Ipopt::DenseVector::SumImpl | ( |  | ) | const`[protected, virtual]`

Computes the sum of the lements of vector.

Implements Ipopt::Vector.

virtual Number Ipopt::DenseVector::SumLogsImpl | ( |  | ) | const`[protected, virtual]`

Computes the sum of the logs of the elements of vector.

Implements Ipopt::Vector.

void Ipopt::DenseVector::AddTwoVectorsImpl | ( | Number | a,
|  | const Vector & | v1,
|  | Number | b,
|  | const Vector & | v2,
|  | Number | c |
| ) |  |  | `[protected]`

Add two vectors (a * v1 + b * v2).

Result is stored in this vector.

Number Ipopt::DenseVector::FracToBoundImpl | ( | const Vector & | delta,
|  | Number | tau |
| ) |  |  | const`[protected]`

Fraction to the boundary parameter.

void Ipopt::DenseVector::AddVectorQuotientImpl | ( | Number | a,
|  | const Vector & | z,
|  | const Vector & | s,
|  | Number | c |
| ) |  |  | `[protected]`

Add the quotient of two vectors, y = a * z/s + c * y.

virtual void Ipopt::DenseVector::PrintImpl | ( | const Journalist & | jnlst,
|  | EJournalLevel | level,
|  | EJournalCategory | category,
|  | const std::string & | name,
|  | Index | indent,
|  | const std::string & | prefix |
| ) |  |  | const`[inline, protected, virtual]`

Print the entire vector.

Implements Ipopt::Vector.

Definition at line 201 of file IpDenseVector.hpp.

void Ipopt::DenseVector::PrintImplOffset | ( | const Journalist & | jnlst,
|  | EJournalLevel | level,
|  | EJournalCategory | category,
|  | const std::string & | name,
|  | Index | indent,
|  | const std::string & | prefix,
|  | Index | offset |
| ) |  |  | const`[protected]`

void Ipopt::DenseVector::operator= | ( | const DenseVector & |  | ) | `[private]`

Overloaded Equals Operator.

Reimplemented from Ipopt::Vector.

Number * Ipopt::DenseVector::values_allocated | ( |  | ) | `[inline, private]`

Method of getting the internal values array, making sure that memory has been allocated.

Definition at line 416 of file IpDenseVector.hpp.

void Ipopt::DenseVector::set_values_from_scalar | ( |  | ) | `[private]`

Auxilliary method for setting explicitly all elements in values_ to the current scalar value.

## Friends And Related Function Documentation

friend class ParVector`[friend]`

Definition at line 220 of file IpDenseVector.hpp.

## Member Data Documentation

const DenseVectorSpace* Ipopt::DenseVector::owner_space_`[private]`

Copy of the owner_space ptr as a DenseVectorSpace instead of a VectorSpace.

Reimplemented from Ipopt::Vector.

Definition at line 244 of file IpDenseVector.hpp.

Number* Ipopt::DenseVector::values_`[private]`

Dense Number array of vector values.

Definition at line 247 of file IpDenseVector.hpp.

Number* Ipopt::DenseVector::expanded_values_`[mutable, private]`

Dense Number array pointer that is used for ExpandedValues.

Definition at line 250 of file IpDenseVector.hpp.

bool Ipopt::DenseVector::initialized_`[private]`

Flag for Initialization.

This flag is false, if the data has not yet been initialized.

Definition at line 259 of file IpDenseVector.hpp.

bool Ipopt::DenseVector::homogeneous_`[private]`

Flag indicating whether the vector is currently homogeneous (that is, all elements have the same value).

This flag is used to determine whether the elements of the vector are stored in values_ or in scalar_

Definition at line 265 of file IpDenseVector.hpp.

Number Ipopt::DenseVector::scalar_`[private]`

Homogeneous value of all elements if the vector is currently homogenous.

Definition at line 269 of file IpDenseVector.hpp.

The documentation for this class was generated from the following file:

- src/LinAlg/IpDenseVector.hpp

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