Mercurial > octave
view liboctave/array/fDiagMatrix.cc @ 30564:796f54d4ddbf stable
update Octave Project Developers copyright for the new year
In files that have the "Octave Project Developers" copyright notice,
update for 2021.
In all .txi and .texi files except gpl.txi and gpl.texi in the
doc/liboctave and doc/interpreter directories, change the copyright
to "Octave Project Developers", the same as used for other source
files. Update copyright notices for 2022 (not done since 2019). For
gpl.txi and gpl.texi, change the copyright notice to be "Free Software
Foundation, Inc." and leave the date at 2007 only because this file
only contains the text of the GPL, not anything created by the Octave
Project Developers.
Add Paul Thomas to contributors.in.
author | John W. Eaton <jwe@octave.org> |
---|---|
date | Tue, 28 Dec 2021 18:22:40 -0500 |
parents | 0a5b15007766 |
children | 597f3ee61a48 |
line wrap: on
line source
//////////////////////////////////////////////////////////////////////// // // Copyright (C) 1994-2022 The Octave Project Developers // // See the file COPYRIGHT.md in the top-level directory of this // distribution or <https://octave.org/copyright/>. // // 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 3 of the License, 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, see // <https://www.gnu.org/licenses/>. // //////////////////////////////////////////////////////////////////////// #if defined (HAVE_CONFIG_H) # include "config.h" #endif #include <ostream> #include "Array-util.h" #include "lo-error.h" #include "mx-base.h" #include "mx-inlines.cc" #include "oct-cmplx.h" // Diagonal Matrix class. bool FloatDiagMatrix::operator == (const FloatDiagMatrix& a) const { if (rows () != a.rows () || cols () != a.cols ()) return 0; return mx_inline_equal (length (), data (), a.data ()); } bool FloatDiagMatrix::operator != (const FloatDiagMatrix& a) const { return !(*this == a); } FloatDiagMatrix& FloatDiagMatrix::fill (float val) { for (octave_idx_type i = 0; i < length (); i++) elem (i, i) = val; return *this; } FloatDiagMatrix& FloatDiagMatrix::fill (float val, octave_idx_type beg, octave_idx_type end) { if (beg < 0 || end >= length () || end < beg) (*current_liboctave_error_handler) ("range error for fill"); for (octave_idx_type i = beg; i <= end; i++) elem (i, i) = val; return *this; } FloatDiagMatrix& FloatDiagMatrix::fill (const FloatColumnVector& a) { octave_idx_type len = length (); if (a.numel () != len) (*current_liboctave_error_handler) ("range error for fill"); for (octave_idx_type i = 0; i < len; i++) elem (i, i) = a.elem (i); return *this; } FloatDiagMatrix& FloatDiagMatrix::fill (const FloatRowVector& a) { octave_idx_type len = length (); if (a.numel () != len) (*current_liboctave_error_handler) ("range error for fill"); for (octave_idx_type i = 0; i < len; i++) elem (i, i) = a.elem (i); return *this; } FloatDiagMatrix& FloatDiagMatrix::fill (const FloatColumnVector& a, octave_idx_type beg) { octave_idx_type a_len = a.numel (); if (beg < 0 || beg + a_len >= length ()) (*current_liboctave_error_handler) ("range error for fill"); for (octave_idx_type i = 0; i < a_len; i++) elem (i+beg, i+beg) = a.elem (i); return *this; } FloatDiagMatrix& FloatDiagMatrix::fill (const FloatRowVector& a, octave_idx_type beg) { octave_idx_type a_len = a.numel (); if (beg < 0 || beg + a_len >= length ()) (*current_liboctave_error_handler) ("range error for fill"); for (octave_idx_type i = 0; i < a_len; i++) elem (i+beg, i+beg) = a.elem (i); return *this; } FloatDiagMatrix FloatDiagMatrix::abs (void) const { return FloatDiagMatrix (extract_diag ().abs (), rows (), columns ()); } FloatDiagMatrix real (const FloatComplexDiagMatrix& a) { return FloatDiagMatrix (real (a.extract_diag ()), a.rows (), a.columns ()); } FloatDiagMatrix imag (const FloatComplexDiagMatrix& a) { return FloatDiagMatrix (imag (a.extract_diag ()), a.rows (), a.columns ()); } FloatMatrix FloatDiagMatrix::extract (octave_idx_type r1, octave_idx_type c1, octave_idx_type r2, octave_idx_type c2) const { if (r1 > r2) { std::swap (r1, r2); } if (c1 > c2) { std::swap (c1, c2); } octave_idx_type new_r = r2 - r1 + 1; octave_idx_type new_c = c2 - c1 + 1; FloatMatrix result (new_r, new_c); for (octave_idx_type j = 0; j < new_c; j++) for (octave_idx_type i = 0; i < new_r; i++) result.elem (i, j) = elem (r1+i, c1+j); return result; } // extract row or column i. FloatRowVector FloatDiagMatrix::row (octave_idx_type i) const { octave_idx_type r = rows (); octave_idx_type c = cols (); if (i < 0 || i >= r) (*current_liboctave_error_handler) ("invalid row selection"); FloatRowVector retval (c, 0.0); if (r <= c || i < c) retval.elem (i) = elem (i, i); return retval; } FloatRowVector FloatDiagMatrix::row (char *s) const { if (! s) (*current_liboctave_error_handler) ("invalid row selection"); char c = s[0]; if (c == 'f' || c == 'F') return row (static_cast<octave_idx_type> (0)); else if (c == 'l' || c == 'L') return row (rows () - 1); else (*current_liboctave_error_handler) ("invalid row selection"); } FloatColumnVector FloatDiagMatrix::column (octave_idx_type i) const { octave_idx_type r = rows (); octave_idx_type c = cols (); if (i < 0 || i >= c) (*current_liboctave_error_handler) ("invalid column selection"); FloatColumnVector retval (r, 0.0); if (r >= c || i < r) retval.elem (i) = elem (i, i); return retval; } FloatColumnVector FloatDiagMatrix::column (char *s) const { if (! s) (*current_liboctave_error_handler) ("invalid column selection"); char c = s[0]; if (c == 'f' || c == 'F') return column (static_cast<octave_idx_type> (0)); else if (c == 'l' || c == 'L') return column (cols () - 1); else (*current_liboctave_error_handler) ("invalid column selection"); } FloatDiagMatrix FloatDiagMatrix::inverse (void) const { octave_idx_type info; return inverse (info); } FloatDiagMatrix FloatDiagMatrix::inverse (octave_idx_type& info) const { octave_idx_type r = rows (); octave_idx_type c = cols (); octave_idx_type len = length (); if (r != c) (*current_liboctave_error_handler) ("inverse requires square matrix"); FloatDiagMatrix retval (r, c); info = 0; for (octave_idx_type i = 0; i < len; i++) { if (elem (i, i) == 0.0) retval.elem (i, i) = octave::numeric_limits<float>::Inf (); else retval.elem (i, i) = 1.0 / elem (i, i); } return retval; } FloatDiagMatrix FloatDiagMatrix::pseudo_inverse (float tol) const { octave_idx_type r = rows (); octave_idx_type c = cols (); octave_idx_type len = length (); FloatDiagMatrix retval (c, r); for (octave_idx_type i = 0; i < len; i++) { float val = std::abs (elem (i, i)); if (val < tol || val == 0.0f) retval.elem (i, i) = 0.0f; else retval.elem (i, i) = 1.0f / elem (i, i); } return retval; } // diagonal matrix by diagonal matrix -> diagonal matrix operations // diagonal matrix by diagonal matrix -> diagonal matrix operations FloatDiagMatrix operator * (const FloatDiagMatrix& a, const FloatDiagMatrix& b) { octave_idx_type a_nr = a.rows (); octave_idx_type a_nc = a.cols (); octave_idx_type b_nr = b.rows (); octave_idx_type b_nc = b.cols (); if (a_nc != b_nr) octave::err_nonconformant ("operator *", a_nr, a_nc, b_nr, b_nc); FloatDiagMatrix c (a_nr, b_nc); octave_idx_type len = c.length (); octave_idx_type lenm = (len < a_nc ? len : a_nc); for (octave_idx_type i = 0; i < lenm; i++) c.dgxelem (i) = a.dgelem (i) * b.dgelem (i); for (octave_idx_type i = lenm; i < len; i++) c.dgxelem (i) = 0.0f; return c; } // other operations FloatDET FloatDiagMatrix::determinant (void) const { FloatDET det (1.0f); if (rows () != cols ()) (*current_liboctave_error_handler) ("determinant requires square matrix"); octave_idx_type len = length (); for (octave_idx_type i = 0; i < len; i++) det *= elem (i, i); return det; } float FloatDiagMatrix::rcond (void) const { FloatColumnVector av = extract_diag (0).map<float> (fabsf); float amx = av.max (); float amn = av.min (); return amx == 0 ? 0.0f : amn / amx; } std::ostream& operator << (std::ostream& os, const FloatDiagMatrix& a) { // int field_width = os.precision () + 7; for (octave_idx_type i = 0; i < a.rows (); i++) { for (octave_idx_type j = 0; j < a.cols (); j++) { if (i == j) os << ' ' /* setw (field_width) */ << a.elem (i, i); else os << ' ' /* setw (field_width) */ << 0.0; } os << "\n"; } return os; }