Mercurial > octave-dspies
view libinterp/corefcn/__pchip_deriv__.cc @ 19010:3fb030666878 draft default tip dspies
Added special-case logical-indexing function
* logical-index.h (New file) : Logical-indexing function. May be called on
octave_value types via call_bool_index
* nz-iterators.h : Add base-class nz_iterator for iterator types. Array has
template bool for whether to internally store row-col or compute on the fly
Add skip_ahead method which skips forward to the next nonzero after its
argument
Add flat_index for computing octave_idx_type index of current position (with
assertion failure in the case of overflow)
Move is_zero to separate file
* ov-base-diag.cc, ov-base-mat.cc, ov-base-sparse.cc, ov-perm.cc
(do_index_op): Add call to call_bool_index in logical-index.h
* Array.h : Move forward-declaration for array_iterator to separate header file
* dim-vector.cc (dim_max): Refers to idx-bounds.h (max_idx)
* array-iter-decl.h (New file): Header file for forward declaration of
array-iterator
* direction.h : Add constants fdirc and bdirc to avoid having to reconstruct
them
* dv-utils.h, dv-utils.cc (New files) :
Utility functions for querying and constructing dim-vectors
* idx-bounds.h (New file) :
Utility constants and functions for determining whether things will overflow
the maximum allowed bounds
* interp-idx.h (New function : to_flat_idx) : Converts row-col pair to linear
index of octave_idx_type
* is-zero.h (New file) : Function for determining whether an element is zero
* logical-index.tst : Add tests for correct return-value dimensions and large
sparse matrix behavior
author | David Spies <dnspies@gmail.com> |
---|---|
date | Fri, 25 Jul 2014 13:39:31 -0600 |
parents | c29b00276818 |
children |
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/* Copyright (C) 2002-2013 Kai Habel Copyright (C) 2008-2009 Jaroslav Hajek 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/>. */ #ifdef HAVE_CONFIG_H #include <config.h> #endif #include "defun.h" #include "error.h" #include "gripes.h" #include "oct-obj.h" #include "utils.h" #include "f77-fcn.h" extern "C" { F77_RET_T F77_FUNC (dpchim, DPCHIM) (const octave_idx_type& n, const double *x, const double *f, double *d, const octave_idx_type &incfd, octave_idx_type *ierr); F77_RET_T F77_FUNC (pchim, PCHIM) (const octave_idx_type& n, const float *x, const float *f, float *d, const octave_idx_type& incfd, octave_idx_type *ierr); } // Wrapper for SLATEC/PCHIP function DPCHIM to calculate the derivates // for piecewise polynomials. DEFUN (__pchip_deriv__, args, , "-*- texinfo -*-\n\ @deftypefn {Built-in Function} {} __pchip_deriv__ (@var{x}, @var{y}, @var{dim})\n\ Undocumented internal function.\n\ @end deftypefn") { octave_value retval; const int nargin = args.length (); bool rows = (nargin == 3 && args(2).uint_value () == 2); if (nargin >= 2) { if (args(0).is_single_type () || args(1).is_single_type ()) { FloatColumnVector xvec (args(0).float_vector_value ()); FloatMatrix ymat (args(1).float_matrix_value ()); octave_idx_type nx = xvec.length (); if (nx < 2) { error ("__pchip_deriv__: X must be at least of length 2"); return retval; } octave_idx_type nyr = ymat.rows (); octave_idx_type nyc = ymat.columns (); if (nx != (rows ? nyc : nyr)) { error ("__pchip_deriv__: X and Y dimension mismatch"); return retval; } const float *yvec = ymat.data (); FloatMatrix dmat (nyr, nyc); float *dvec = dmat.fortran_vec (); octave_idx_type ierr; const octave_idx_type incfd = rows ? nyr : 1; const octave_idx_type inc = rows ? 1 : nyr; for (octave_idx_type i = (rows ? nyr : nyc); i > 0; i--) { F77_XFCN (pchim, PCHIM, (nx, xvec.data (), yvec, dvec, incfd, &ierr)); yvec += inc; dvec += inc; if (ierr < 0) { error ("PCHIM: error: %i\n", ierr); return retval; } } retval = dmat; } else { ColumnVector xvec (args(0).vector_value ()); Matrix ymat (args(1).matrix_value ()); octave_idx_type nx = xvec.length (); if (nx < 2) { error ("__pchip_deriv__: X must be at least of length 2"); return retval; } octave_idx_type nyr = ymat.rows (); octave_idx_type nyc = ymat.columns (); if (nx != (rows ? nyc : nyr)) { error ("__pchip_deriv__: X and Y dimension mismatch"); return retval; } const double *yvec = ymat.data (); Matrix dmat (nyr, nyc); double *dvec = dmat.fortran_vec (); octave_idx_type ierr; const octave_idx_type incfd = rows ? nyr : 1; const octave_idx_type inc = rows ? 1 : nyr; for (octave_idx_type i = (rows ? nyr : nyc); i > 0; i--) { F77_XFCN (dpchim, DPCHIM, (nx, xvec.data (), yvec, dvec, incfd, &ierr)); yvec += inc; dvec += inc; if (ierr < 0) { error ("DPCHIM: error: %i\n", ierr); return retval; } } retval = dmat; } } return retval; } /* ## No test needed for internal helper function. %!assert (1) */