Mercurial > octave-dspies
view scripts/geometry/dsearchn.m @ 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 | d63878346099 |
children |
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## Copyright (C) 2007-2013 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/>. ## -*- texinfo -*- ## @deftypefn {Function File} {@var{idx} =} dsearchn (@var{x}, @var{tri}, @var{xi}) ## @deftypefnx {Function File} {@var{idx} =} dsearchn (@var{x}, @var{tri}, @var{xi}, @var{outval}) ## @deftypefnx {Function File} {@var{idx} =} dsearchn (@var{x}, @var{xi}) ## @deftypefnx {Function File} {[@var{idx}, @var{d}] =} dsearchn (@dots{}) ## Return the index @var{idx} or the closest point in @var{x} to the elements ## @var{xi}. If @var{outval} is supplied, then the values of @var{xi} that are ## not contained within one of the simplices @var{tri} are set to ## @var{outval}. Generally, @var{tri} is returned from @code{delaunayn ## (@var{x})}. ## @seealso{dsearch, tsearch} ## @end deftypefn function [idx, d] = dsearchn (x, tri, xi, outval) if (nargin < 2 || nargin > 4) print_usage (); endif if (nargin == 2) [idx, d] = __dsearchn__ (x, tri); else [idx, d] = __dsearchn__ (x, xi); if (nargin == 4) idx2 = isnan (tsearchn (x, tri, xi)); idx(idx2) = outval; d(idx2) = outval; endif endif endfunction %!shared x, tri %! x = [-1,-1;-1,1;1,-1]; %! tri = [1,2,3]; %!assert (dsearchn (x,tri,[1,1/3]), 3) %!assert (dsearchn (x,tri,[1,1/3],NaN), NaN) %!assert (dsearchn (x,tri,[1,1/3],NA), NA) %!assert (dsearchn (x,tri,[1/3,1]), 2) %!assert (dsearchn (x,tri,[1/3,1],NaN), NaN) %!assert (dsearchn (x,tri,[1/3,1],NA), NA)