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authorHarpreet2016-09-03 00:36:51 +0530
committerHarpreet2016-09-03 00:36:51 +0530
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+// Copyright (C) 2004, 2009 International Business Machines and others.
+// All Rights Reserved.
+// This code is published under the Eclipse Public License.
+//
+// $Id: IpExpansionMatrix.hpp 2269 2013-05-05 11:32:40Z stefan $
+//
+// Authors: Carl Laird, Andreas Waechter IBM 2004-08-13
+
+#ifndef __IPEXPANSIONMATRIX_HPP__
+#define __IPEXPANSIONMATRIX_HPP__
+
+#include "IpUtils.hpp"
+#include "IpMatrix.hpp"
+
+namespace Ipopt
+{
+
+ /** forward declarations */
+ class ExpansionMatrixSpace;
+
+ /** Class for expansion/projection matrices. These matrices allow
+ * to lift a vector to a vector with larger dimension, keeping
+ * some elements of the larger vector zero. This operation is achieved
+ * by the MultVector operation. The transpose operation then
+ * filters some elements from a large vector into a smaller vector.
+ */
+ class ExpansionMatrix : public Matrix
+ {
+ public:
+
+ /**@name Constructors / Destructors */
+ //@{
+
+ /** Constructor, taking the owner_space.
+ */
+ ExpansionMatrix(const ExpansionMatrixSpace* owner_space);
+
+ /** Destructor */
+ ~ExpansionMatrix();
+ //@}
+
+ /** Return the vector of indices marking the expanded position.
+ * The result is the Index array (of length NSmallVec=NCols())
+ * that stores the mapping from the small vector to the large
+ * vector. For each element i=0,..,NSmallVec in the small
+ * vector, ExpandedPosIndices()[i] give the corresponding index
+ * in the large vector.
+ */
+ const Index* ExpandedPosIndices() const;
+
+ /** Return the vector of indices marking the compressed position.
+ * The result is the Index array (of length NLargeVec=NRows())
+ * that stores the mapping from the large vector to the small
+ * vector. For each element i=0,..,NLargeVec in the large
+ * vector, CompressedPosIndices()[i] gives the corresponding
+ * index in the small vector, unless CompressedPosIndices()[i] is
+ * negative.
+ */
+ const Index* CompressedPosIndices() const;
+
+ protected:
+ /**@name Overloaded methods from Matrix base class*/
+ //@{
+ virtual void MultVectorImpl(Number alpha, const Vector &x, Number beta,
+ Vector &y) const;
+
+ virtual void TransMultVectorImpl(Number alpha, const Vector& x,
+ Number beta, Vector& y) const;
+
+ /** X = beta*X + alpha*(Matrix S^{-1} Z). Specialized implementation.
+ */
+ virtual void AddMSinvZImpl(Number alpha, const Vector& S, const Vector& Z,
+ Vector& X) const;
+
+ /** X = S^{-1} (r + alpha*Z*M^Td). Specialized implementation.
+ */
+ virtual void SinvBlrmZMTdBrImpl(Number alpha, const Vector& S,
+ const Vector& R, const Vector& Z,
+ const Vector& D, Vector& X) const;
+
+ virtual void ComputeRowAMaxImpl(Vector& rows_norms, bool init) const;
+
+ virtual void ComputeColAMaxImpl(Vector& cols_norms, bool init) const;
+
+ virtual void PrintImpl(const Journalist& jnlst,
+ EJournalLevel level,
+ EJournalCategory category,
+ const std::string& name,
+ Index indent,
+ const std::string& prefix) const
+ {
+ PrintImplOffset(jnlst, level, category, name, indent, prefix, 1, 1);
+ }
+ //@}
+
+ void PrintImplOffset(const Journalist& jnlst,
+ EJournalLevel level,
+ EJournalCategory category,
+ const std::string& name,
+ Index indent,
+ const std::string& prefix,
+ Index row_offset,
+ Index col_offset) const;
+
+ friend class ParExpansionMatrix;
+
+ private:
+ /**@name 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. */
+ //@{
+ /** Default Constructor */
+ ExpansionMatrix();
+
+ /** Copy Constructor */
+ ExpansionMatrix(const ExpansionMatrix&);
+
+ /** Overloaded Equals Operator */
+ void operator=(const ExpansionMatrix&);
+ //@}
+
+ const ExpansionMatrixSpace* owner_space_;
+
+ };
+
+ /** This is the matrix space for ExpansionMatrix.
+ */
+ class ExpansionMatrixSpace : public MatrixSpace
+ {
+ public:
+ /** @name Constructors / Destructors */
+ //@{
+ /** Constructor, given the list of elements of the large vector
+ * (of size NLargeVec) to be filtered into the small vector (of
+ * size NSmallVec). For each i=0..NSmallVec-1 the i-th element
+ * of the small vector will be put into the ExpPos[i] position of
+ * the large vector. The position counting in the vector is
+ * assumed to start at 0 (C-like array notation).
+ */
+ ExpansionMatrixSpace(Index NLargeVec,
+ Index NSmallVec,
+ const Index *ExpPos,
+ const int offset = 0);
+
+ /** Destructor */
+ ~ExpansionMatrixSpace()
+ {
+ delete [] compressed_pos_;
+ delete [] expanded_pos_;
+ }
+ //@}
+
+ /** Method for creating a new matrix of this specific type. */
+ ExpansionMatrix* MakeNewExpansionMatrix() const
+ {
+ return new ExpansionMatrix(this);
+ }
+
+ /** Overloaded MakeNew method for the MatrixSpace base class.
+ */
+ virtual Matrix* MakeNew() const
+ {
+ return MakeNewExpansionMatrix();
+ }
+
+ /** Accessor Method to obtain the Index array (of length
+ * NSmallVec=NCols()) that stores the mapping from the small
+ * vector to the large vector. For each element i=0,..,NSmallVec
+ * in the small vector, ExpandedPosIndices()[i] give the
+ * corresponding index in the large vector.
+ */
+ const Index* ExpandedPosIndices() const
+ {
+ return expanded_pos_;
+ }
+
+ /** Accessor Method to obtain the Index array (of length
+ * NLargeVec=NRows()) that stores the mapping from the large
+ * vector to the small vector. For each element i=0,..,NLargeVec
+ * in the large vector, CompressedPosIndices()[i] gives the
+ * corresponding index in the small vector, unless
+ * CompressedPosIndices()[i] is negative.
+ */
+ const Index* CompressedPosIndices() const
+ {
+ return compressed_pos_;
+ }
+
+ private:
+ Index *expanded_pos_;
+ Index *compressed_pos_;
+ };
+
+ /* inline methods */
+ inline
+ const Index* ExpansionMatrix::ExpandedPosIndices() const
+ {
+ return owner_space_->ExpandedPosIndices();
+ }
+
+ inline
+ const Index* ExpansionMatrix::CompressedPosIndices() const
+ {
+ return owner_space_->CompressedPosIndices();
+ }
+
+} // namespace Ipopt
+#endif