Mercurial > octave
view libinterp/corefcn/__dsearchn__.cc @ 23433:c9fab0bc983e
maint: Use convention 'int& x' for naming references.
* ButtonGroup.cc, Canvas.cc, Canvas.h, annotation-dialog.cc,
annotation-dialog.h, dialog.h, documentation-dock-widget.cc,
files-dock-widget.cc, files-dock-widget.h, find-files-dialog.cc,
find-files-dialog.h, find-files-model.cc, find-files-model.h,
history-dock-widget.cc, history-dock-widget.h, file-editor-tab.cc,
file-editor-tab.h, file-editor.cc, file-editor.h, main-window.cc,
main-window.h, octave-qt-link.h, parser.cc, parser.h, webinfo.cc, webinfo.h,
settings-dialog.cc, bsxfun.cc, call-stack.cc, call-stack.h, fft.cc, fft2.cc,
fftn.cc, gl-render.cc, graphics.cc, graphics.in.h, input.cc, load-save.cc,
ls-hdf5.cc, ls-hdf5.h, octave-link.h, pr-output.cc, regexp.cc, sparse-xdiv.cc,
sparse-xdiv.h, symtab.cc, xdiv.cc, xdiv.h, zfstream.h, __eigs__.cc,
__ode15__.cc, ov-base.h, ov-builtin.cc, ov-cx-sparse.h, ov-fcn-handle.cc,
ov-fcn-handle.h, ov.cc, ov.h, jit-ir.h, jit-typeinfo.cc, jit-typeinfo.h,
pt-jit.cc, pt-jit.h, CMatrix.cc, CMatrix.h, CSparse.cc, CSparse.h,
MatrixType.cc, MatrixType.h, dDiagMatrix.cc, dMatrix.cc, dMatrix.h, dSparse.cc,
dSparse.h, fCMatrix.cc, fCMatrix.h, fDiagMatrix.cc, fMatrix.cc, fMatrix.h,
eigs-base.cc, oct-fftw.cc, oct-rand.h, sparse-dmsolve.cc, kpse.cc, lo-regexp.h:
Use convention 'int& x' for naming references.
author | Rik <rik@octave.org> |
---|---|
date | Mon, 24 Apr 2017 17:20:37 -0700 |
parents | 092078913d54 |
children | bd77ab816e43 |
line wrap: on
line source
/* Copyright (C) 2007-2017 David Bateman 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 (HAVE_CONFIG_H) # include "config.h" #endif #include <iostream> #include <fstream> #include <string> #include "lo-math.h" #include "defun.h" #include "error.h" #include "ovl.h" DEFUN (__dsearchn__, args, , doc: /* -*- texinfo -*- @deftypefn {} {[@var{idx}, @var{d}] =} dsearch (@var{x}, @var{xi}) Undocumented internal function. @end deftypefn */) { if (args.length () != 2) print_usage (); Matrix x = args(0).matrix_value ().transpose (); Matrix xi = args(1).matrix_value ().transpose (); if (x.rows () != xi.rows () || x.columns () < 1) error ("__dsearch__: number of rows of X and XI must match"); octave_idx_type n = x.rows (); octave_idx_type nx = x.columns (); octave_idx_type nxi = xi.columns (); ColumnVector idx (nxi); double *pidx = idx.fortran_vec (); ColumnVector dist (nxi); double *pdist = dist.fortran_vec (); #define DIST(dd, y, yi, m) \ dd = 0.0; \ for (octave_idx_type k = 0; k < m; k++) \ { \ double yd = y[k] - yi[k]; \ dd += yd * yd; \ } \ dd = sqrt (dd) const double *pxi = xi.fortran_vec (); for (octave_idx_type i = 0; i < nxi; i++) { double d0; const double *px = x.fortran_vec (); DIST(d0, px, pxi, n); *pidx = 1.; for (octave_idx_type j = 1; j < nx; j++) { px += n; double d; DIST (d, px, pxi, n); if (d < d0) { d0 = d; *pidx = static_cast<double>(j + 1); } octave_quit (); } *pdist++ = d0; pidx++; pxi += n; } return ovl (idx, dist); } /* ## No test needed for internal helper function. %!assert (1) */