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- // RowVector manipulations. -*- C++ -*-
- /*
-
- Copyright (C) 1992, 1993, 1994, 1995 John W. Eaton
-
- This file is part of Octave.
-
- Octave is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by the
- Free Software Foundation; either version 2, or (at your option) any
- later version.
-
- Octave is distributed in the hope that it will be useful, but WITHOUT
- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- for more details.
-
- You should have received a copy of the GNU General Public License
- along with Octave; see the file COPYING. If not, write to the Free
- Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
-
- */
-
- #ifdef HAVE_CONFIG_H
- #include "config.h"
- #endif
-
- #include <iostream.h>
-
- #include <Complex.h>
-
- #include "mx-base.h"
- #include "mx-inlines.cc"
- #include "lo-error.h"
- #include "f77-uscore.h"
-
- // Fortran functions we call.
-
- extern "C"
- {
- int F77_FCN (dgemv) (const char*, const int*, const int*,
- const double*, const double*, const int*,
- const double*, const int*, const double*,
- double*, const int*, long);
-
- double F77_FCN (ddot) (const int*, const double*, const int*,
- const double*, const int*);
- }
-
- /*
- * Row Vector class.
- */
-
- #define KLUDGE_VECTORS
- #define TYPE double
- #define KL_VEC_TYPE RowVector
- #include "mx-kludge.cc"
- #undef KLUDGE_VECTORS
- #undef TYPE
- #undef KL_VEC_TYPE
-
- #if 0
- RowVector&
- RowVector::resize (int n)
- {
- if (n < 0)
- {
- (*current_liboctave_error_handler)
- ("can't resize to negative dimension");
- return *this;
- }
-
- double *new_data = 0;
- if (n > 0)
- {
- new_data = new double [n];
- int min_len = len < n ? len : n;
-
- for (int i = 0; i < min_len; i++)
- new_data[i] = data[i];
- }
-
- delete [] data;
- len = n;
- data = new_data;
-
- return *this;
- }
-
- RowVector&
- RowVector::resize (int n, double val)
- {
- int old_len = len;
- resize (n);
- for (int i = old_len; i < len; i++)
- data[i] = val;
-
- return *this;
- }
- #endif
-
- int
- RowVector::operator == (const RowVector& a) const
- {
- int len = length ();
- if (len != a.length ())
- return 0;
- return equal (data (), a.data (), len);
- }
-
- int
- RowVector::operator != (const RowVector& a) const
- {
- return !(*this == a);
- }
-
- RowVector&
- RowVector::insert (const RowVector& a, int c)
- {
- int a_len = a.length ();
- if (c < 0 || c + a_len - 1 > length ())
- {
- (*current_liboctave_error_handler) ("range error for insert");
- return *this;
- }
-
- for (int i = 0; i < a_len; i++)
- elem (c+i) = a.elem (i);
-
- return *this;
- }
-
- RowVector&
- RowVector::fill (double val)
- {
- int len = length ();
- if (len > 0)
- for (int i = 0; i < len; i++)
- elem (i) = val;
- return *this;
- }
-
- RowVector&
- RowVector::fill (double val, int c1, int c2)
- {
- int len = length ();
- if (c1 < 0 || c2 < 0 || c1 >= len || c2 >= len)
- {
- (*current_liboctave_error_handler) ("range error for fill");
- return *this;
- }
-
- if (c1 > c2) { int tmp = c1; c1 = c2; c2 = tmp; }
-
- for (int i = c1; i <= c2; i++)
- elem (i) = val;
-
- return *this;
- }
-
- RowVector
- RowVector::append (const RowVector& a) const
- {
- int len = length ();
- int nc_insert = len;
- RowVector retval (len + a.length ());
- retval.insert (*this, 0);
- retval.insert (a, nc_insert);
- return retval;
- }
-
- ColumnVector
- RowVector::transpose (void) const
- {
- int len = length ();
- return ColumnVector (dup (data (), len), len);
- }
-
- RowVector
- RowVector::extract (int c1, int c2) const
- {
- if (c1 > c2) { int tmp = c1; c1 = c2; c2 = tmp; }
-
- int new_c = c2 - c1 + 1;
-
- RowVector result (new_c);
-
- for (int i = 0; i < new_c; i++)
- result.elem (i) = elem (c1+i);
-
- return result;
- }
-
- // row vector by row vector -> row vector operations
-
- RowVector&
- RowVector::operator += (const RowVector& a)
- {
- int len = length ();
- if (len != a.length ())
- {
- (*current_liboctave_error_handler)
- ("nonconformant vector += operation attempted");
- return *this;
- }
-
- if (len == 0)
- return *this;
-
- double *d = fortran_vec (); // Ensures only one reference to my privates!
-
- add2 (d, a.data (), len);
- return *this;
- }
-
- RowVector&
- RowVector::operator -= (const RowVector& a)
- {
- int len = length ();
- if (len != a.length ())
- {
- (*current_liboctave_error_handler)
- ("nonconformant vector -= operation attempted");
- return *this;
- }
-
- if (len == 0)
- return *this;
-
- double *d = fortran_vec (); // Ensures only one reference to my privates!
-
- subtract2 (d, a.data (), len);
- return *this;
- }
-
- // row vector by scalar -> row vector operations
-
- ComplexRowVector
- operator + (const RowVector& v, const Complex& s)
- {
- int len = v.length ();
- return ComplexRowVector (add (v.data (), len, s), len);
- }
-
- ComplexRowVector
- operator - (const RowVector& v, const Complex& s)
- {
- int len = v.length ();
- return ComplexRowVector (subtract (v.data (), len, s), len);
- }
-
- ComplexRowVector
- operator * (const RowVector& v, const Complex& s)
- {
- int len = v.length ();
- return ComplexRowVector (multiply (v.data (), len, s), len);
- }
-
- ComplexRowVector
- operator / (const RowVector& v, const Complex& s)
- {
- int len = v.length ();
- return ComplexRowVector (divide (v.data (), len, s), len);
- }
-
- // scalar by row vector -> row vector operations
-
- ComplexRowVector
- operator + (const Complex& s, const RowVector& a)
- {
- return ComplexRowVector ();
- }
-
- ComplexRowVector
- operator - (const Complex& s, const RowVector& a)
- {
- return ComplexRowVector ();
- }
-
- ComplexRowVector
- operator * (const Complex& s, const RowVector& a)
- {
- return ComplexRowVector ();
- }
-
- ComplexRowVector
- operator / (const Complex& s, const RowVector& a)
- {
- return ComplexRowVector ();
- }
-
- // row vector by column vector -> scalar
-
- double
- operator * (const RowVector& v, const ColumnVector& a)
- {
- int len = v.length ();
- if (len != a.length ())
- {
- (*current_liboctave_error_handler)
- ("nonconformant vector multiplication attempted");
- return 0.0;
- }
-
- int i_one = 1;
- return F77_FCN (ddot) (&len, v.data (), &i_one, a.data (), &i_one);
- }
-
- Complex
- operator * (const RowVector& v, const ComplexColumnVector& a)
- {
- ComplexRowVector tmp (v);
- return tmp * a;
- }
-
- // row vector by matrix -> row vector
-
- RowVector
- operator * (const RowVector& v, const Matrix& a)
- {
- int len = v.length ();
- if (a.rows () != len)
- {
- (*current_liboctave_error_handler)
- ("nonconformant vector multiplication attempted");
- return RowVector ();
- }
-
- if (len == 0 || a.cols () == 0)
- return RowVector (0);
-
- // Transpose A to form A'*x == (x'*A)'
-
- int a_nr = a.rows ();
- int a_nc = a.cols ();
-
- char trans = 'T';
- int ld = a_nr;
- double alpha = 1.0;
- double beta = 0.0;
- int i_one = 1;
-
- double *y = new double [len];
-
- F77_FCN (dgemv) (&trans, &a_nc, &a_nr, &alpha, a.data (), &ld,
- v.data (), &i_one, &beta, y, &i_one, 1L);
-
- return RowVector (y, len);
- }
-
- ComplexRowVector
- operator * (const RowVector& v, const ComplexMatrix& a)
- {
- ComplexRowVector tmp (v);
- return tmp * a;
- }
-
- // row vector by row vector -> row vector operations
-
- ComplexRowVector
- operator + (const RowVector& v, const ComplexRowVector& a)
- {
- int len = v.length ();
- if (len != a.length ())
- {
- (*current_liboctave_error_handler)
- ("nonconformant vector addition attempted");
- return ComplexRowVector ();
- }
-
- if (len == 0)
- return ComplexRowVector (0);
-
- return ComplexRowVector (add (v.data (), a.data (), len), len);
- }
-
- ComplexRowVector
- operator - (const RowVector& v, const ComplexRowVector& a)
- {
- int len = v.length ();
- if (len != a.length ())
- {
- (*current_liboctave_error_handler)
- ("nonconformant vector subtraction attempted");
- return ComplexRowVector ();
- }
-
- if (len == 0)
- return ComplexRowVector (0);
-
- return ComplexRowVector (subtract (v.data (), a.data (), len), len);
- }
-
- ComplexRowVector
- product (const RowVector& v, const ComplexRowVector& a)
- {
- int len = v.length ();
- if (len != a.length ())
- {
- (*current_liboctave_error_handler)
- ("nonconformant vector product attempted");
- return ComplexRowVector ();
- }
-
- if (len == 0)
- return ComplexRowVector (0);
-
- return ComplexRowVector (multiply (v.data (), a.data (), len), len);
- }
-
- ComplexRowVector
- quotient (const RowVector& v, const ComplexRowVector& a)
- {
- int len = v.length ();
- if (len != a.length ())
- {
- (*current_liboctave_error_handler)
- ("nonconformant vector quotient attempted");
- return ComplexRowVector ();
- }
-
- if (len == 0)
- return ComplexRowVector (0);
-
- return ComplexRowVector (divide (v.data (), a.data (), len), len);
- }
-
- // other operations
-
- RowVector
- map (d_d_Mapper f, const RowVector& a)
- {
- RowVector b (a);
- b.map (f);
- return b;
- }
-
- void
- RowVector::map (d_d_Mapper f)
- {
- for (int i = 0; i < length (); i++)
- elem (i) = f (elem (i));
- }
-
- RowVector
- linspace (double x1, double x2, int n)
- {
- RowVector retval;
-
- if (n > 0)
- {
- retval.resize (n);
- double delta = (x2 - x1) / (n - 1);
- retval.elem (0) = x1;
- for (int i = 1; i < n-1; i++)
- retval.elem (i) = x1 + i * delta;
- retval.elem (n-1) = x2;
- }
-
- return retval;
- }
-
- double
- RowVector::min (void) const
- {
- int len = length ();
- if (len == 0)
- return 0;
-
- double res = elem (0);
-
- for (int i = 1; i < len; i++)
- if (elem (i) < res)
- res = elem (i);
-
- return res;
- }
-
- double
- RowVector::max (void) const
- {
- int len = length ();
- if (len == 0)
- return 0;
-
- double res = elem (0);
-
- for (int i = 1; i < len; i++)
- if (elem (i) > res)
- res = elem (i);
-
- return res;
- }
-
- ostream&
- operator << (ostream& os, const RowVector& a)
- {
- // int field_width = os.precision () + 7;
- for (int i = 0; i < a.length (); i++)
- os << " " /* setw (field_width) */ << a.elem (i);
- return os;
- }
-
- istream&
- operator >> (istream& is, RowVector& a)
- {
- int len = a.length();
-
- if (len < 1)
- is.clear (ios::badbit);
- else
- {
- double tmp;
- for (int i = 0; i < len; i++)
- {
- is >> tmp;
- if (is)
- a.elem (i) = tmp;
- else
- break;
- }
- }
- return is;
- }
-
- /*
- ;;; Local Variables: ***
- ;;; mode: C++ ***
- ;;; page-delimiter: "^/\\*" ***
- ;;; End: ***
- */
-