Mercurial > octave
annotate libinterp/corefcn/lookup.cc @ 21966:112b20240c87
move docstrings in C++ files out of C strings and into comments
* __contourc__.cc, __dispatch__.cc, __dsearchn__.cc, __ichol__.cc,
__ilu__.cc, __lin_interpn__.cc, __luinc__.cc, __magick_read__.cc,
__pchip_deriv__.cc, __qp__.cc, balance.cc, besselj.cc, betainc.cc,
bitfcns.cc, bsxfun.cc, cellfun.cc, colloc.cc, conv2.cc, daspk.cc,
dasrt.cc, dassl.cc, data.cc, debug.cc, defaults.cc, det.cc, dirfns.cc,
dlmread.cc, dot.cc, eig.cc, ellipj.cc, error.cc, fft.cc, fft2.cc,
fftn.cc, file-io.cc, filter.cc, find.cc, gammainc.cc, gcd.cc,
getgrent.cc, getpwent.cc, getrusage.cc, givens.cc, graphics.cc,
hash.cc, help.cc, hess.cc, hex2num.cc, input.cc, inv.cc, kron.cc,
load-path.cc, load-save.cc, lookup.cc, ls-oct-text.cc, lsode.cc,
lu.cc, mappers.cc, matrix_type.cc, max.cc, mgorth.cc, nproc.cc,
oct-hist.cc, octave-link.cc, ordschur.cc, pager.cc, pinv.cc,
pr-output.cc, profiler.cc, psi.cc, pt-jit.cc, quad.cc, quadcc.cc,
qz.cc, rand.cc, rcond.cc, regexp.cc, schur.cc, sighandlers.cc,
sparse.cc, spparms.cc, sqrtm.cc, str2double.cc, strfind.cc, strfns.cc,
sub2ind.cc, svd.cc, sylvester.cc, symtab.cc, syscalls.cc, sysdep.cc,
time.cc, toplev.cc, tril.cc, tsearch.cc, typecast.cc, urlwrite.cc,
utils.cc, variables.cc, __delaunayn__.cc, __eigs__.cc,
__fltk_uigetfile__.cc, __glpk__.cc, __init_fltk__.cc,
__init_gnuplot__.cc, __osmesa_print__.cc, __voronoi__.cc, amd.cc,
audiodevinfo.cc, audioread.cc, ccolamd.cc, chol.cc, colamd.cc,
convhulln.cc, dmperm.cc, fftw.cc, qr.cc, symbfact.cc, symrcm.cc,
ov-base.cc, ov-bool-mat.cc, ov-cell.cc, ov-class.cc, ov-classdef.cc,
ov-fcn-handle.cc, ov-fcn-inline.cc, ov-flt-re-mat.cc, ov-int16.cc,
ov-int32.cc, ov-int64.cc, ov-int8.cc, ov-java.cc, ov-null-mat.cc,
ov-oncleanup.cc, ov-range.cc, ov-re-mat.cc, ov-struct.cc,
ov-typeinfo.cc, ov-uint16.cc, ov-uint32.cc, ov-uint64.cc, ov-uint8.cc,
ov-usr-fcn.cc, ov.cc, octave.cc, pt-arg-list.cc, pt-binop.cc,
pt-eval.cc, pt-mat.cc, lex.ll, oct-parse.in.yy:
Docstrings are now comments instead of C strings.
* build-aux/mk-opts.pl: Emit docstrings as comments instead of C
strings.
* DASPK-opts.in, LSODE-opts.in: Don't quote " in docstring fragments.
* builtins.h: Include builtin-defun-decls.h unconditionally.
* defun.h (DEFUN, DEFUNX, DEFCONSTFUN): Simply emit declaration.
(DEFALIAS): Always expand to nothing.
* defun-dld.h: No special macro expansions for MAKE_BUILTINS.
(DEFUN_DLD): Use FORWARD_DECLARE_FUN.
(DEFUNX_DLD): Use FORWARD_DECLARE_FUNX.
* defun-int.h: No special macro expansions for MAKE_BUILTINS.
(FORWARD_DECLARE_FUN, FORWARD_DECLARE_FUNX): New macros.
(DEFINE_FUN_INSTALLER_FUN): If compiling an Octave source file, pass
"external-doc" to DEFINE_FUNX_INSTALLER_FUN.
(DEFUN_INTERNAL, DEFCONSTFUN_INTERNAL, DEFUNX_INTERNAL,
DEFALIAS_INTERNAL): Delete.
* common.mk (move_if_change_rule): New macro.
(simple_move_if_change_rule): Define using move_if_change_rule.
* find-defun-files.sh (DEFUN_PATTERN): Update. Don't transform file
name extension to ".df".
* libinterp/mk-pkg-add, gendoc.pl: Operate directly on source files.
* mkbuiltins: New argument, SRCDIR. Operate directly on source files.
* mkdefs: Delete.
* libinterp/module.mk (BUILT_SOURCES): Update list to contain only
files included in other source files.
(GENERATED_MAKE_BUILTINS_INCS, DEF_FILES): Delete.
(LIBINTERP_BUILT_DISTFILES): Include $(OPT_HANDLERS) here.
(LIBINTERP_BUILT_NODISTFILES): Not here. Remove $(ALL_DEF_FILES from
the list.
(libinterp_EXTRA_DIST): Remove mkdefs from the list.
(FOUND_DEFUN_FILES): Rename from SRC_DEF_FILES.
(DLDFCN_DEFUN_FILES): Rename from DLDFCN_DEF_FILES.
(SRC_DEFUN_FILES): Rename from SRC_DEF_FILES.
(ALL_DEFUN_FILES): Rename from ALL_DEF_FILES.
(%.df: %.cc): Delete pattern rule.
(libinterp/build-env-features.cc, libinterp/builtins.cc,
libinterp/dldfcn/PKG_ADD): Use mv instead of move-if-change.
(libinterp/builtins.cc, libinterp/builtin-defun-decls.h):
Update mkbuiltins command.
($(srcdir)/libinterp/DOCSTRINGS): Update gendoc.pl command.
* liboctave/module.mk (BUILT_SOURCES): Don't include
liboctave-build-info.cc in the list.
author | John W. Eaton <jwe@octave.org> |
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date | Tue, 21 Jun 2016 16:07:51 -0400 |
parents | b571fc85953f |
children | e43d83253e28 |
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1 /* |
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2 |
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3 Copyright (C) 2008-2015 VZLU Prague a.s., Czech Republic |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by |
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9 the Free Software Foundation; either version 3 of the License, or (at |
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10 your option) any later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but |
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13 WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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15 General Public License for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, see |
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19 <http://www.gnu.org/licenses/>. |
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20 |
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21 */ |
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22 |
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23 // Author: Jaroslav Hajek <highegg@gmail.com> |
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24 |
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25 #if defined (HAVE_CONFIG_H) |
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26 # include "config.h" |
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27 #endif |
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28 |
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29 #include <cctype> |
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30 #include <functional> |
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31 #include <algorithm> |
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32 |
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33 #include "dNDArray.h" |
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34 #include "CNDArray.h" |
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35 |
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36 #include "Cell.h" |
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37 #include "defun.h" |
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38 #include "error.h" |
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39 #include "errwarn.h" |
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40 #include "ovl.h" |
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41 #include "ov.h" |
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42 |
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43 static |
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44 bool |
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45 contains_char (const std::string& str, char c) |
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46 { |
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47 return (str.find (c) != std::string::npos |
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48 || str.find (std::toupper (c)) != std::string::npos); |
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49 } |
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50 |
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51 // case-insensitive character comparison functors |
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52 struct icmp_char_lt : public std::binary_function<char, char, bool> |
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53 { |
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54 bool operator () (char x, char y) const |
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55 { return std::toupper (x) < std::toupper (y); } |
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56 }; |
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57 |
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58 struct icmp_char_gt : public std::binary_function<char, char, bool> |
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59 { |
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60 bool operator () (char x, char y) const |
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61 { return std::toupper (x) > std::toupper (y); } |
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62 }; |
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63 |
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64 // FIXME: maybe these should go elsewhere? |
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65 // FIXME: are they even needed now? |
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66 // case-insensitive ascending comparator |
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67 #if 0 |
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68 static bool |
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69 stri_comp_lt (const std::string& a, const std::string& b) |
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70 { |
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71 return std::lexicographical_compare (a.begin (), a.end (), |
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72 b.begin (), b.end (), |
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73 icmp_char_lt ()); |
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74 } |
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75 |
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76 // case-insensitive descending comparator |
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77 static bool |
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78 stri_comp_gt (const std::string& a, const std::string& b) |
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79 { |
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80 return std::lexicographical_compare (a.begin (), a.end (), |
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81 b.begin (), b.end (), |
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82 icmp_char_gt ()); |
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83 } |
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84 #endif |
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85 |
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86 template <typename T> |
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87 inline sortmode |
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88 get_sort_mode (const Array<T>& array, |
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89 typename octave_sort<T>::compare_fcn_type desc_comp |
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90 = octave_sort<T>::descending_compare) |
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91 { |
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92 octave_idx_type n = array.numel (); |
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93 if (n > 1 && desc_comp (array (0), array (n-1))) |
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94 return DESCENDING; |
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95 else |
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96 return ASCENDING; |
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97 } |
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98 |
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99 // FIXME: perhaps there should be octave_value::lookup? |
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100 // The question is, how should it behave w.r.t. the second argument's type. |
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101 // We'd need a dispatch on two arguments. Hmmm... |
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102 |
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103 #define INT_ARRAY_LOOKUP(TYPE) \ |
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104 (table.is_ ## TYPE ## _type () && y.is_ ## TYPE ## _type ()) \ |
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105 retval = do_numeric_lookup (table.TYPE ## _array_value (), \ |
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106 y.TYPE ## _array_value (), \ |
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107 left_inf, right_inf, \ |
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108 match_idx, match_bool); |
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109 template <typename ArrayT> |
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110 static octave_value |
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111 do_numeric_lookup (const ArrayT& array, const ArrayT& values, |
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112 bool left_inf, bool right_inf, |
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113 bool match_idx, bool match_bool) |
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114 { |
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115 octave_value retval; |
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116 |
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117 Array<octave_idx_type> idx = array.lookup (values); |
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118 octave_idx_type n = array.numel (); |
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119 octave_idx_type nval = values.numel (); |
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120 |
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121 // Post-process. |
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122 if (match_bool) |
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123 { |
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124 boolNDArray match (idx.dims ()); |
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125 for (octave_idx_type i = 0; i < nval; i++) |
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126 { |
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127 octave_idx_type j = idx.xelem (i); |
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128 match.xelem (i) = j != 0 && values(i) == array(j-1); |
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129 } |
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130 |
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131 retval = match; |
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132 } |
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133 else if (match_idx || left_inf || right_inf) |
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134 { |
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135 if (match_idx) |
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136 { |
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137 NDArray ridx (idx.dims ()); |
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138 |
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139 for (octave_idx_type i = 0; i < nval; i++) |
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140 { |
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141 octave_idx_type j = idx.xelem (i); |
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142 ridx.xelem (i) = (j != 0 && values(i) == array(j-1)) ? j : 0; |
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143 } |
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144 |
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145 retval = ridx; |
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146 } |
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147 else if (left_inf && right_inf) |
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148 { |
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149 // Results in valid indices. Optimize using lazy index. |
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150 octave_idx_type zero = 0; |
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151 for (octave_idx_type i = 0; i < nval; i++) |
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152 { |
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153 octave_idx_type j = idx.xelem (i) - 1; |
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154 idx.xelem (i) = std::max (zero, std::min (j, n-2)); |
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155 } |
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156 |
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157 retval = idx_vector (idx); |
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158 } |
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159 else if (left_inf) |
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160 { |
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161 // Results in valid indices. Optimize using lazy index. |
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162 octave_idx_type zero = 0; |
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163 for (octave_idx_type i = 0; i < nval; i++) |
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164 { |
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165 octave_idx_type j = idx.xelem (i) - 1; |
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166 idx.xelem (i) = std::max (zero, j); |
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167 } |
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168 |
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169 retval = idx_vector (idx); |
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170 } |
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171 else if (right_inf) |
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172 { |
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173 NDArray ridx (idx.dims ()); |
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174 |
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175 for (octave_idx_type i = 0; i < nval; i++) |
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176 { |
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177 octave_idx_type j = idx.xelem (i); |
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178 ridx.xelem (i) = std::min (j, n-1); |
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179 } |
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180 |
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181 retval = ridx; |
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182 } |
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183 } |
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184 else |
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185 retval = idx; |
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186 |
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187 return retval; |
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188 } |
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189 |
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190 DEFUN (lookup, args, , |
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191 doc: /* -*- texinfo -*- |
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192 @deftypefn {} {@var{idx} =} lookup (@var{table}, @var{y}) |
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193 @deftypefnx {} {@var{idx} =} lookup (@var{table}, @var{y}, @var{opt}) |
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194 Lookup values in a sorted table. |
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195 |
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196 This function is usually used as a prelude to interpolation. |
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197 |
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198 If table is increasing and @code{idx = lookup (table, y)}, then |
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199 @code{table(idx(i)) <= y(i) < table(idx(i+1))} for all @code{y(i)} within |
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200 the table. If @code{y(i) < table(1)} then @code{idx(i)} is 0. If |
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201 @code{y(i) >= table(end)} or @code{isnan (y(i))} then @code{idx(i)} is |
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202 @code{n}. |
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203 |
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204 If the table is decreasing, then the tests are reversed. |
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205 For non-strictly monotonic tables, empty intervals are always skipped. |
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206 The result is undefined if @var{table} is not monotonic, or if |
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207 @var{table} contains a NaN. |
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208 |
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209 The complexity of the lookup is O(M*log(N)) where N is the size of |
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210 @var{table} and M is the size of @var{y}. In the special case when @var{y} |
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211 is also sorted, the complexity is O(min(M*log(N),M+N)). |
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212 |
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213 @var{table} and @var{y} can also be cell arrays of strings |
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214 (or @var{y} can be a single string). In this case, string lookup |
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215 is performed using lexicographical comparison. |
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216 |
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217 If @var{opts} is specified, it must be a string with letters indicating |
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218 additional options. |
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219 |
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220 @table @code |
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221 @item m |
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222 @code{table(idx(i)) == val(i)} if @code{val(i)} |
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223 occurs in table; otherwise, @code{idx(i)} is zero. |
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224 |
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225 @item b |
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226 @code{idx(i)} is a logical 1 or 0, indicating whether |
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227 @code{val(i)} is contained in table or not. |
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228 |
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229 @item l |
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230 For numeric lookups |
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231 the leftmost subinterval shall be extended to infinity (i.e., all indices |
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232 at least 1) |
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233 |
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234 @item r |
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235 For numeric lookups |
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236 the rightmost subinterval shall be extended to infinity (i.e., all indices |
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237 at most n-1). |
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238 @end table |
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239 @end deftypefn */) |
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240 { |
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241 int nargin = args.length (); |
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242 |
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243 if (nargin < 2 || nargin > 3) |
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244 print_usage (); |
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245 |
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246 octave_value table = args(0); |
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247 octave_value y = args(1); |
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248 if (table.ndims () > 2 || (table.columns () > 1 && table.rows () > 1)) |
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249 warning ("lookup: table is not a vector"); |
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250 |
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251 octave_value retval; |
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252 |
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253 bool num_case = ((table.is_numeric_type () && y.is_numeric_type ()) |
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254 || (table.is_char_matrix () && y.is_char_matrix ())); |
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255 bool str_case = table.is_cellstr () && (y.is_string () || y.is_cellstr ()); |
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256 bool left_inf = false; |
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257 bool right_inf = false; |
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258 bool match_idx = false; |
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259 bool match_bool = false; |
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260 |
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261 if (nargin == 3) |
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262 { |
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263 std::string opt = args(2).xstring_value ("lookup: OPT must be a string"); |
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264 left_inf = contains_char (opt, 'l'); |
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265 right_inf = contains_char (opt, 'r'); |
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266 match_idx = contains_char (opt, 'm'); |
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267 match_bool = contains_char (opt, 'b'); |
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268 if (opt.find_first_not_of ("lrmb") != std::string::npos) |
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269 error ("lookup: unrecognized option: %c", |
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270 opt[opt.find_first_not_of ("lrmb")]); |
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271 } |
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272 |
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273 if ((match_idx || match_bool) && (left_inf || right_inf)) |
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274 error ("lookup: m, b cannot be specified with l or r"); |
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275 else if (match_idx && match_bool) |
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276 error ("lookup: only one of m or b can be specified"); |
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277 else if (str_case && (left_inf || right_inf)) |
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278 error ("lookup: l, r are not recognized for string lookups"); |
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279 |
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280 if (num_case) |
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281 { |
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282 // In the case of a complex array, absolute values will be used for |
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283 // compatibility (though it's not too meaningful). |
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284 if (table.is_complex_type ()) |
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285 table = table.abs (); |
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286 |
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287 if (y.is_complex_type ()) |
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288 y = y.abs (); |
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289 |
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290 Array<octave_idx_type> idx; |
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291 |
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292 // PS: I learned this from data.cc |
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293 if INT_ARRAY_LOOKUP (int8) |
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294 else if INT_ARRAY_LOOKUP (int16) |
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295 else if INT_ARRAY_LOOKUP (int32) |
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296 else if INT_ARRAY_LOOKUP (int64) |
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297 else if INT_ARRAY_LOOKUP (uint8) |
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298 else if INT_ARRAY_LOOKUP (uint16) |
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299 else if INT_ARRAY_LOOKUP (uint32) |
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300 else if INT_ARRAY_LOOKUP (uint64) |
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301 else if (table.is_char_matrix () && y.is_char_matrix ()) |
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302 retval = do_numeric_lookup (table.char_array_value (), |
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303 y.char_array_value (), |
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304 left_inf, right_inf, |
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305 match_idx, match_bool); |
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306 else if (table.is_single_type () || y.is_single_type ()) |
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307 retval = do_numeric_lookup (table.float_array_value (), |
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308 y.float_array_value (), |
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309 left_inf, right_inf, |
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310 match_idx, match_bool); |
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311 else |
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312 retval = do_numeric_lookup (table.array_value (), |
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313 y.array_value (), |
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314 left_inf, right_inf, |
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315 match_idx, match_bool); |
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316 } |
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317 else if (str_case) |
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318 { |
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319 Array<std::string> str_table = table.cellstr_value (); |
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320 Array<std::string> str_y (dim_vector (1, 1)); |
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321 |
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322 if (y.is_cellstr ()) |
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323 str_y = y.cellstr_value (); |
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324 else |
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325 str_y(0) = y.string_value (); |
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326 |
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327 Array<octave_idx_type> idx = str_table.lookup (str_y); |
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328 octave_idx_type nval = str_y.numel (); |
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329 |
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330 // Post-process. |
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331 if (match_bool) |
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332 { |
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333 boolNDArray match (idx.dims ()); |
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334 for (octave_idx_type i = 0; i < nval; i++) |
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335 { |
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336 octave_idx_type j = idx.xelem (i); |
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337 match.xelem (i) = j != 0 && str_y(i) == str_table(j-1); |
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338 } |
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339 |
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340 retval = match; |
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341 } |
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342 else if (match_idx) |
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343 { |
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344 NDArray ridx (idx.dims ()); |
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345 if (match_idx) |
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346 { |
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347 for (octave_idx_type i = 0; i < nval; i++) |
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348 { |
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349 octave_idx_type j = idx.xelem (i); |
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350 ridx.xelem (i) = (j != 0 && str_y(i) == str_table(j-1)) ? j |
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351 : 0; |
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352 } |
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353 } |
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354 |
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355 retval = ridx; |
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356 } |
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357 else |
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358 retval = idx; |
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359 } |
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360 else |
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361 print_usage (); |
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362 |
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363 return retval; |
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364 } |
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365 |
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366 /* |
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367 %!assert (lookup (1:3, 0.5), 0) # value before table |
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368 %!assert (lookup (1:3, 3.5), 3) # value after table error |
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369 %!assert (lookup (1:3, 1.5), 1) # value within table error |
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370 %!assert (lookup (1:3, [3,2,1]), [3,2,1]) |
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371 %!assert (lookup ([1:4]', [1.2, 3.5]'), [1, 3]') |
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372 %!assert (lookup ([1:4], [1.2, 3.5]'), [1, 3]') |
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373 %!assert (lookup ([1:4]', [1.2, 3.5]), [1, 3]) |
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374 %!assert (lookup ([1:4], [1.2, 3.5]), [1, 3]) |
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375 %!assert (lookup (1:3, [3, 2, 1]), [3, 2, 1]) |
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376 %!assert (lookup ([3:-1:1], [3.5, 3, 1.2, 2.5, 2.5]), [0, 1, 2, 1, 1]) |
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377 %!assert (isempty (lookup ([1:3], []))) |
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378 %!assert (isempty (lookup ([1:3]', []))) |
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379 %!assert (lookup (1:3, [1, 2; 3, 0.5]), [1, 2; 3, 0]) |
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380 %!assert (lookup (1:4, [1, 1.2; 3, 2.5], "m"), [1, 0; 3, 0]) |
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381 %!assert (lookup (4:-1:1, [1, 1.2; 3, 2.5], "m"), [4, 0; 2, 0]) |
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382 %!assert (lookup (1:4, [1, 1.2; 3, 2.5], "b"), logical ([1, 0; 3, 0])) |
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383 %!assert (lookup (4:-1:1, [1, 1.2; 3, 2.5], "b"), logical ([4, 0; 2, 0])) |
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384 %! |
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385 %!assert (lookup ({"apple","lemon","orange"}, {"banana","kiwi"; "ananas","mango"}), [1,1;0,2]) |
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386 %!assert (lookup ({"apple","lemon","orange"}, "potato"), 3) |
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387 %!assert (lookup ({"orange","lemon","apple"}, "potato"), 0) |
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388 */ |