Mercurial > octave-antonio
view liboctave/numeric/dbleSCHUR.h @ 20161:65e22ba879f0
psi: add support to compute the polygamma function (kth-derivative).
* libinterp/corefcn/psi.cc: previously, only the digamma function, k == 0,
was being computed. Add support for polygamma function, add tests, and
improve documentation.
* liboctave/cruft/slatec-fn/dpsifn.f, liboctave/cruft/slatec-fn/psifn.f: the
two functions that actually compute the the polygamma functions, copied
verbatim from SLATEC, and under public domain.
* liboctave/cruft/slatec-fn/module.mk: add dpsifn.f and psifn.f to the build
system.
* liboctave/numeric/lo-specfun.cc: add new signature for function psi to
compute polygamma function that wraps the Fortran DPSIFN and PSIFN functions.
* liboctave/numeric/lo-specfun.h: declare new function and document all psi()
with doxygen.
author | Carnë Draug <carandraug@octave.org> |
---|---|
date | Sun, 03 May 2015 22:52:07 +0100 |
parents | 4197fc428c7d |
children |
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/* Copyright (C) 1994-2015 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 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 <http://www.gnu.org/licenses/>. */ #if !defined (octave_dbleSCHUR_h) #define octave_dbleSCHUR_h 1 #include <iosfwd> #include <string> #include "dMatrix.h" class OCTAVE_API SCHUR { public: SCHUR (void) : schur_mat (), unitary_mat (), selector (0) { } SCHUR (const Matrix& a, const std::string& ord, bool calc_unitary = true) : schur_mat (), unitary_mat (), selector (0) { init (a, ord, calc_unitary); } SCHUR (const Matrix& a, const std::string& ord, int& info, bool calc_unitary = true) : schur_mat (), unitary_mat (), selector (0) { info = init (a, ord, calc_unitary); } SCHUR (const SCHUR& a) : schur_mat (a.schur_mat), unitary_mat (a.unitary_mat), selector (0) { } SCHUR (const Matrix& s, const Matrix& u); SCHUR& operator = (const SCHUR& a) { if (this != &a) { schur_mat = a.schur_mat; unitary_mat = a.unitary_mat; } return *this; } ~SCHUR (void) { } Matrix schur_matrix (void) const { return schur_mat; } Matrix unitary_matrix (void) const { return unitary_mat; } friend std::ostream& operator << (std::ostream& os, const SCHUR& a); typedef octave_idx_type (*select_function) (const double&, const double&); private: Matrix schur_mat; Matrix unitary_mat; select_function selector; octave_idx_type init (const Matrix& a, const std::string& ord, bool calc_unitary); }; #endif