Mercurial > octave
view liboctave/array/fDiagMatrix.cc @ 29358:0a5b15007766 stable
update Octave Project Developers copyright for the new year
In files that have the "Octave Project Developers" copyright notice,
update for 2021.
author | John W. Eaton <jwe@octave.org> |
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date | Wed, 10 Feb 2021 09:52:15 -0500 |
parents | bd51beb6205e |
children | 796f54d4ddbf |
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//////////////////////////////////////////////////////////////////////// // // Copyright (C) 1994-2021 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; }