Mercurial > octave
annotate scripts/set/unique.m @ 28896:90fea9cc9caa
test: Add expected error message <Invalid call> to BIST tests for nargin.
* acosd.m, acot.m, acotd.m, acoth.m, acsc.m, acscd.m, acsch.m, asec.m,
asecd.m, asech.m, asind.m, atand.m, cosd.m, cot.m, cotd.m, coth.m, csc.m,
cscd.m, csch.m, sec.m, secd.m, sech.m, sind.m, tand.m, cart2pol.m, cart2sph.m,
celldisp.m, common_size.m, deal.m, del2.m, fliplr.m, integral2.m, interp1.m,
isequal.m, isequaln.m, nextpow2.m, pol2cart.m, quad2d.m, quadl.m, quadv.m,
randi.m, rat.m, repelem.m, rescale.m, shiftdim.m, sortrows.m, sph2cart.m,
xor.m, convhull.m, delaunay.m, delaunayn.m, griddata.m, griddatan.m,
inpolygon.m, voronoi.m, voronoin.m, listdlg.m, msgbox.m, questdlg.m,
rmappdata.m, setappdata.m, __gripe_missing_component__.m,
get_first_help_sentence.m, type.m, which.m, cmpermute.m, cmunique.m,
gray2ind.m, imfinfo.m, imshow.m, imwrite.m, ind2rgb.m, movie.m, rgb2ind.m,
importdata.m, bandwidth.m, condeig.m, gls.m, housh.m, linsolve.m, logm.m,
lscov.m, normest.m, normest1.m, ols.m, ordeig.m, planerot.m, qzhess.m, rref.m,
copyfile.m, delete.m, dos.m, fileparts.m, getfield.m, menu.m, mkdir.m,
movefile.m, orderfields.m, publish.m, setfield.m, substruct.m, unix.m,
unpack.m, decic.m, ode23.m, ode23s.m, ode45.m, fminsearch.m, lsqnonneg.m,
pqpnonneg.m, sqp.m, annotation.m, lighting.m, shading.m, area.m, compass.m,
contourc.m, feather.m, fplot.m, hist.m, isocaps.m, isocolors.m, isonormals.m,
isosurface.m, ostreamtube.m, pie.m, pie3.m, reducepatch.m, reducevolume.m,
rose.m, smooth3.m, stairs.m, stem.m, stem3.m, stream2.m, stream3.m,
streamline.m, streamribbon.m, streamtube.m, surfnorm.m, trimesh.m, trisurf.m,
colstyle.m, hgload.m, linkprop.m, meshgrid.m, ndgrid.m, padecoef.m, polyfit.m,
polyval.m, unmkpp.m, profexport.m, ismember.m, unique.m, movfun.m, movslice.m,
periodogram.m, sinc.m, spdiags.m, sprandsym.m, betaincinv.m, ellipke.m,
factor.m, gammainc.m, gammaincinv.m, isprime.m, lcm.m, gallery.m, hadamard.m,
bounds.m, corrcoef.m, discrete_rnd.m, empirical_rnd.m, histc.m, mode.m,
movmad.m, movmax.m, movmean.m, movmedian.m, movmin.m, movprod.m, movstd.m,
movsum.m, movvar.m, ranks.m, runlength.m, zscore.m, str2num.m, strchr.m,
strsplit.m, strtok.m, untabify.m, assert.m, demo.m, example.m, speed.m, test.m,
datenum.m, datevec.m, webread.m, webwrite.m:
Add expected error message <Invalid call> to BIST tests for nargin.
Remove redundant tests for nargin greater than the number of declared inputs
which are now handled by interpreter.
author | Rik <rik@octave.org> |
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date | Sun, 11 Oct 2020 21:59:35 -0700 |
parents | bd51beb6205e |
children | 7854d5752dd2 |
rev | line source |
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1 ######################################################################## |
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2 ## |
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3 ## Copyright (C) 2000-2020 The Octave Project Developers |
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4 ## |
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5 ## See the file COPYRIGHT.md in the top-level directory of this |
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6 ## distribution or <https://octave.org/copyright/>. |
7016 | 7 ## |
8 ## This file is part of Octave. | |
5165 | 9 ## |
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10 ## Octave is free software: you can redistribute it and/or modify it |
7016 | 11 ## under the terms of the GNU General Public License as published by |
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12 ## the Free Software Foundation, either version 3 of the License, or |
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13 ## (at your option) any later version. |
5165 | 14 ## |
7016 | 15 ## Octave is distributed in the hope that it will be useful, but |
16 ## WITHOUT ANY WARRANTY; without even the implied warranty of | |
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17 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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18 ## GNU General Public License for more details. |
5165 | 19 ## |
20 ## You should have received a copy of the GNU General Public License | |
7016 | 21 ## along with Octave; see the file COPYING. If not, see |
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22 ## <https://www.gnu.org/licenses/>. |
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23 ## |
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24 ######################################################################## |
5165 | 25 |
26 ## -*- texinfo -*- | |
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27 ## @deftypefn {} {} unique (@var{x}) |
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28 ## @deftypefnx {} {} unique (@var{x}, "rows") |
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29 ## @deftypefnx {} {} unique (@dots{}, "sorted") |
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30 ## @deftypefnx {} {} unique (@dots{}, "stable") |
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31 ## @deftypefnx {} {[@var{y}, @var{i}, @var{j}] =} unique (@dots{}) |
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32 ## @deftypefnx {} {[@var{y}, @var{i}, @var{j}] =} unique (@dots{}, "first") |
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33 ## @deftypefnx {} {[@var{y}, @var{i}, @var{j}] =} unique (@dots{}, "last") |
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34 ## @deftypefnx {} {[@var{y}, @var{i}, @var{j}] =} unique (@dots{}, "legacy") |
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35 ## Return the unique elements of @var{x}. |
5165 | 36 ## |
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37 ## If the input @var{x} is a column vector then return a column vector; |
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38 ## Otherwise, return a row vector. @var{x} may also be a cell array of |
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39 ## strings. |
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40 ## |
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41 ## If the optional argument @qcode{"rows"} is given then return the unique |
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42 ## rows of @var{x}. The input must be a 2-D numeric matrix to use this option. |
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43 ## |
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44 ## The optional argument @qcode{"sorted"}/@qcode{"stable"} controls the order |
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45 ## in which unique values appear in the output. The default is |
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46 ## @qcode{"sorted"} and values in the output are placed in ascending order. |
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47 ## The alternative @qcode{"stable"} preserves the order found in the input |
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48 ## @var{x}. |
5165 | 49 ## |
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50 ## If requested, return column index vectors @var{i} and @var{j} such that |
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51 ## @code{@var{y} = @var{x}(@var{i})} and @code{@var{x} = @var{y}(@var{j})}. |
8887 | 52 ## |
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53 ## Additionally, if @var{i} is a requested output then one of the flags |
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54 ## @qcode{"first"} or @qcode{"last"} may be given. If @qcode{"last"} is |
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55 ## specified, return the highest possible indices in @var{i}, otherwise, if |
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56 ## @qcode{"first"} is specified, return the lowest. The default is |
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57 ## @qcode{"first"}. |
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58 ## |
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59 ## Example 1 : sort order |
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60 ## |
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61 ## @example |
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62 ## @group |
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63 ## unique ([3, 1, 1, 2]) |
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64 ## @result{} [1, 2, 3] |
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65 ## unique ([3, 1, 1, 2], "stable") |
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66 ## @result{} [3, 1, 2] |
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67 ## @end group |
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68 ## @end example |
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69 ## |
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70 ## Example 2 : index selection |
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71 ## |
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72 ## @example |
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73 ## @group |
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74 ## [~, @var{i}] = unique ([3, 1, 1, 2], "first") |
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75 ## @result{} @var{i} = [2; 4; 1] |
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76 ## [~, @var{i}] = unique ([3, 1, 1, 2], "last") |
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77 ## @result{} @var{i} = [3; 4; 1] |
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78 ## @end group |
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79 ## @end example |
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80 ## |
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81 ## Programming Notes: The input flag @qcode{"legacy"} changes the algorithm |
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82 ## to be compatible with @sc{matlab} releases prior to R2012b. Specifically, |
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83 ## The index ordering flag is changed to @qcode{"last"}, and the shape of the |
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84 ## outputs @var{i}, @var{j} will follow the shape of the input @var{x} rather |
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85 ## than always being column vectors. |
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86 ## |
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87 ## The third output, @var{j}, has not been implemented yet when the sort |
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88 ## order is @qcode{"stable"}. |
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89 ## |
5642 | 90 ## @seealso{union, intersect, setdiff, setxor, ismember} |
5165 | 91 ## @end deftypefn |
92 | |
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93 function [y, i, j] = unique (x, varargin) |
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95 if (nargin < 1) |
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97 elseif (! (isnumeric (x) || islogical (x) || ischar (x) || iscellstr (x))) |
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98 error ("unique: X must be an array or cell array of strings"); |
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100 | |
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101 if (nargin > 1) |
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102 ## parse options |
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103 if (! iscellstr (varargin)) |
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104 error ("unique: options must be strings"); |
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105 endif |
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106 |
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107 optrows = any (strcmp ("rows", varargin)); |
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108 optfirst = any (strcmp ("first", varargin)); |
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109 optlast = any (strcmp ("last", varargin)); |
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110 optsorted = any (strcmp ("sorted", varargin)); |
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111 optstable = any (strcmp ("stable", varargin)); |
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112 optlegacy = any (strcmp ("legacy", varargin)); |
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113 if (optfirst && optlast) |
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114 error ('unique: cannot specify both "first" and "last"'); |
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115 elseif (optsorted && optstable) |
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116 error ('unique: cannot specify both "sorted" and "stable"'); |
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117 elseif ((optfirst || optlast) && (optsorted || optstable)) |
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118 error ('unique: cannot specify "first"/"last" with "sorted"/"stable"'); |
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119 elseif (optlegacy && (optsorted || optstable)) |
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120 error ('unique: cannot specify "sorted" or "stable" with "legacy"'); |
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121 elseif (optrows + optfirst + optlast + optsorted + optstable + optlegacy |
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122 != nargin-1) |
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123 error ("unique: invalid option"); |
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124 endif |
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125 |
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126 ## Set defaults if not set earlier. |
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127 if (! optfirst && ! optlast) |
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128 optfirst = true; |
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129 endif |
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130 if (! optsorted && ! optstable) |
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131 optsorted = true; |
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132 endif |
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133 |
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134 if (optrows && iscellstr (x)) |
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135 warning ('unique: "rows" is ignored for cell arrays'); |
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136 optrows = false; |
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137 endif |
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138 else |
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139 optrows = false; |
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140 optfirst = true; |
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141 optsorted = true; |
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142 optlegacy = false; |
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143 endif |
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144 |
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145 ## FIXME: The operations |
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146 ## |
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147 ## match = (y(1:n-1) == y(2:n)); |
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148 ## y(idx) = []; |
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149 ## |
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150 ## are very slow on sparse matrices. Until they are fixed to be as |
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151 ## fast as for full matrices, operate on the nonzero elements of the |
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152 ## sparse array as long as we are not operating on rows. |
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153 if (issparse (x) && ! optrows && nargout <= 1) |
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154 if (nnz (x) < numel (x)) |
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155 y = unique ([0; nonzeros(x)], varargin{:}); |
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156 else |
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157 ## Corner case where sparse matrix is actually full |
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158 y = unique (full (x), varargin{:}); |
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159 endif |
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160 return; |
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161 endif |
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162 |
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163 if (optrows) |
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164 n = rows (x); |
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165 isrowvec = false; |
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166 else |
6609 | 167 n = numel (x); |
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168 isrowvec = isrow (x); |
5165 | 169 endif |
170 | |
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171 ## Special cases 0 and 1 |
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172 if (n == 0) |
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173 y = x; |
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174 if (! optrows && any (size (x))) |
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175 if (iscellstr (x)) |
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176 y = cell (0, 1); |
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177 else |
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178 y = zeros (0, 1, class (x)); |
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179 endif |
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180 endif |
5165 | 181 i = j = []; |
5168 | 182 return; |
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183 elseif (n == 1) |
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184 y = x; |
5165 | 185 i = j = 1; |
5168 | 186 return; |
5165 | 187 endif |
188 | |
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189 ## Calculate y output |
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190 if (optrows) |
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191 if (nargout > 1 || ! optsorted) |
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192 [y, i] = sortrows (x); |
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193 i = i(:); |
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194 else |
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195 y = sortrows (x); |
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196 endif |
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197 match = all (y(1:n-1,:) == y(2:n,:), 2); |
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198 if (optsorted) |
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199 y(match,:) = []; |
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200 else |
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201 y = x; |
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202 y(i([false; match]), :) = []; |
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203 endif |
5165 | 204 else |
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205 if (isvector (x)) |
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206 y = x; |
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207 else |
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208 y = x(:); |
5168 | 209 endif |
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210 if (nargout > 1 || ! optsorted) |
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211 [y, i] = sort (y); |
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212 i = i(:); |
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213 else |
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214 y = sort (y); |
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215 endif |
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216 if (iscellstr (y)) |
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217 match = strcmp (y(1:n-1), y(2:n)); |
5205 | 218 else |
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219 match = (y(1:n-1) == y(2:n)); |
5205 | 220 endif |
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221 if (optsorted) |
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222 y(match) = []; |
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223 else |
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224 if (isvector (x)) |
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225 y = x; |
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226 else |
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227 y = x(:); |
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228 endif |
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229 y(i([false; match(:)])) = []; |
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230 endif |
5165 | 231 endif |
232 | |
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233 ## Calculate j output (3rd output) |
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234 if (isargout (3)) |
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235 j = i; # cheap way to copy dimensions |
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236 j(i) = cumsum ([1; ! match(:)]); |
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237 if (! optsorted) |
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238 warning ("unique: third output J is not yet implemented"); |
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239 j = []; |
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240 endif |
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241 |
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242 if (optlegacy && isrowvec) |
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243 j = j.'; |
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244 endif |
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246 |
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247 ## Calculate i output (2nd output) |
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248 if (isargout (2)) |
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249 if (optsorted) |
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250 idx = find (match); |
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251 if (! optlegacy && optfirst) |
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252 idx += 1; # in-place is faster than other forms of increment |
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253 endif |
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254 i(idx) = []; |
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255 else |
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256 i([false; match(:)]) = []; |
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257 ## FIXME: Is there a way to avoid a call to sort? |
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258 i = sort (i); |
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259 endif |
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260 |
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261 if (optlegacy && isrowvec) |
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262 i = i.'; |
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263 endif |
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264 endif |
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266 endfunction | |
267 | |
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268 |
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269 %!assert (unique ([1 1 2; 1 2 1; 1 1 2]), [1;2]) |
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270 %!assert (unique ([1 1 2; 1 0 1; 1 1 2],"rows"), [1 0 1; 1 1 2]) |
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271 %!assert (unique ([]), []) |
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272 %!assert (unique ([1]), [1]) |
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273 %!assert (unique ([1 2]), [1 2]) |
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274 %!assert (unique ([1;2]), [1;2]) |
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275 %!assert (unique ([1,NaN,Inf,NaN,Inf]), [1,Inf,NaN,NaN]) |
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276 %!assert (unique ([1,NaN,Inf,NaN,Inf], "stable"), [1,NaN,Inf,NaN]) |
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277 %!assert (unique ({"Foo","Bar","Foo"}), {"Bar","Foo"}) |
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278 %!assert (unique ({"Foo","Bar","Foo"}, "stable"), {"Foo", "Bar"}) |
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279 %!assert (unique ({"Foo","Bar","FooBar"}'), {"Bar","Foo","FooBar"}') |
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280 %!assert (unique (zeros (1,0)), zeros (0,1)) |
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281 %!assert (unique (zeros (1,0), "rows"), zeros (1,0)) |
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282 %!assert (unique (cell (1,0)), cell (0,1)) |
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283 %!assert (unique ({}), {}) |
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284 %!assert (unique ([1,2,2,3,2,4], "rows"), [1,2,2,3,2,4]) |
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285 %!assert (unique ([1,2,2,3,2,4]), [1,2,3,4]) |
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286 %!assert (unique ([1,2,2,3,2,4]', "rows"), [1;2;3;4]) |
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287 %!assert (unique (sparse ([2,0;2,0])), [0;2]) |
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288 %!assert (unique (sparse ([1,2;2,3])), [1;2;3]) |
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289 %!assert (unique ([1,2,2,3,2,4]', "rows"), [1;2;3;4]) |
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290 %!assert (unique (single ([1,2,2,3,2,4]), "rows"), single ([1,2,2,3,2,4])) |
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291 %!assert (unique (single ([1,2,2,3,2,4])), single ([1,2,3,4])) |
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292 %!assert (unique (single ([1,2,2,3,2,4]'), "rows"), single ([1;2;3;4])) |
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293 %!assert (unique (uint8 ([1,2,2,3,2,4]), "rows"), uint8 ([1,2,2,3,2,4])) |
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294 %!assert (unique (uint8 ([1,2,2,3,2,4])), uint8 ([1,2,3,4])) |
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295 %!assert (unique (uint8 ([1,2,2,3,2,4]'), "rows"), uint8 ([1;2;3;4])) |
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296 |
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297 ## Test options with numeric inputs |
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298 %!test |
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299 %! [y,i,j] = unique ([1,1,2,3,3,3,4], "sorted"); |
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300 %! assert (y, [1,2,3,4]); |
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301 %! assert (i, [1;3;4;7]); |
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302 %! assert (j, [1;1;2;3;3;3;4]); |
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303 |
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304 %!test |
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305 %! [y,i,~] = unique ([4,4,2,2,2,3,1], "stable"); |
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306 %! assert (y, [4,2,3,1]); |
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307 %! assert (i, [1;3;6;7]); |
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308 %! ##assert (j, []); |
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309 |
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310 %!test |
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311 %! [y,i,j] = unique ([1,1,2,3,3,3,4]', "last"); |
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312 %! assert (y, [1,2,3,4]'); |
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313 %! assert (i, [2;3;6;7]); |
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314 %! assert (j, [1;1;2;3;3;3;4]); |
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315 |
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316 ## Test options with cellstr inputs |
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317 %!test |
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318 %! [y,i,j] = unique ({"z"; "z"; "z"}); |
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319 %! assert (y, {"z"}); |
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320 %! assert (i, [1]); |
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321 %! assert (j, [1;1;1]); |
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322 |
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323 %!test |
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324 %! [y,i,~] = unique ({"B"; "A"; "B"}, "stable"); |
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325 %! assert (y, {"B"; "A"}); |
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326 %! assert (i, [1; 2]); |
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327 |
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328 %!test |
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329 %! A = [1,2,3; 1,2,3]; |
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330 %! [y,i,j] = unique (A, "rows"); |
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331 %! assert (y, [1,2,3]); |
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332 %! assert (A(i,:), y); |
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333 %! assert (y(j,:), A); |
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334 |
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335 %!test |
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336 %! A = [4,5,6; 1,2,3; 4,5,6]; |
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337 %! [y,i,~] = unique (A, "rows", "stable"); |
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338 %! assert (y, [4,5,6; 1,2,3]); |
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339 %! assert (A(i,:), y); |
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340 %! ##assert (y(j,:), A); |
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341 |
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342 ## Test "legacy" option |
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343 %!test |
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344 %! [y,i,j] = unique ([1,1,2,3,3,3,4], "legacy"); |
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345 %! assert (y, [1,2,3,4]); |
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346 %! assert (i, [2,3,6,7]); |
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347 %! assert (j, [1,1,2,3,3,3,4]); |
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348 |
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349 %!test |
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350 %! A = [7 9 7; 0 0 0; 7 9 7; 5 5 5; 1 4 5]; |
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351 %! [y,i,j] = unique (A, "rows", "legacy"); |
d29a12e8b6d9
unique.m: Set default to "first" when multiple options present.
Rik <rik@octave.org>
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352 %! assert (y, [0 0 0; 1 4 5; 5 5 5; 7 9 7]); |
d29a12e8b6d9
unique.m: Set default to "first" when multiple options present.
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353 %! assert (i, [2; 5; 4; 3]); |
d29a12e8b6d9
unique.m: Set default to "first" when multiple options present.
Rik <rik@octave.org>
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354 %! assert (j, [4; 1; 4; 3; 2]); |
27228
c80681b4948d
unique.m: Fix special case of "legacy" and "rows" flag both present.
Rik <rik@octave.org>
parents:
27226
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355 |
19833
9fc020886ae9
maint: Clean up m-files to follow Octave coding conventions.
Rik <rik@octave.org>
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356 ## Test input validation |
28896
90fea9cc9caa
test: Add expected error message <Invalid call> to BIST tests for nargin.
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357 %!error <Invalid call> unique () |
19700
00e31f316a3a
Fix Matlab incompatibility of "ismatrix" (bug #42422).
Kai T. Ohlhus <k.ohlhus@gmail.com>
parents:
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358 %!error <X must be an array or cell array of strings> unique ({1}) |
19003
d00f6b09258f
Overhaul functions in scripts/set directory.
Rik <rik@octave.org>
parents:
18857
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359 %!error <options must be strings> unique (1, 2) |
d00f6b09258f
Overhaul functions in scripts/set directory.
Rik <rik@octave.org>
parents:
18857
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360 %!error <cannot specify both "first" and "last"> unique (1, "first", "last") |
27291
c4f9a0f097a3
unique.m: Add new option "stable" to control output ordering.
Rik <rik@octave.org>
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361 %!error <cannot specify both "sorted" and "stable"> |
c4f9a0f097a3
unique.m: Add new option "stable" to control output ordering.
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362 %! unique (1, "sorted", "stable"); |
c4f9a0f097a3
unique.m: Add new option "stable" to control output ordering.
Rik <rik@octave.org>
parents:
27236
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363 %!error <cannot specify "first"/"last" with "sorted"/"stable"> |
c4f9a0f097a3
unique.m: Add new option "stable" to control output ordering.
Rik <rik@octave.org>
parents:
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364 %! unique (1, "first", "sorted"); |
c4f9a0f097a3
unique.m: Add new option "stable" to control output ordering.
Rik <rik@octave.org>
parents:
27236
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365 %!error <cannot specify "first"/"last" with "sorted"/"stable"> |
c4f9a0f097a3
unique.m: Add new option "stable" to control output ordering.
Rik <rik@octave.org>
parents:
27236
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366 %! unique (1, "last", "stable"); |
c4f9a0f097a3
unique.m: Add new option "stable" to control output ordering.
Rik <rik@octave.org>
parents:
27236
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367 %!error <cannot specify "sorted" or "stable" with "legacy"> |
c4f9a0f097a3
unique.m: Add new option "stable" to control output ordering.
Rik <rik@octave.org>
parents:
27236
diff
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368 %! unique (1, "sorted", "legacy"); |
c4f9a0f097a3
unique.m: Add new option "stable" to control output ordering.
Rik <rik@octave.org>
parents:
27236
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369 %!error <cannot specify "sorted" or "stable" with "legacy"> |
c4f9a0f097a3
unique.m: Add new option "stable" to control output ordering.
Rik <rik@octave.org>
parents:
27236
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370 %! unique (1, "stable", "legacy"); |
19003
d00f6b09258f
Overhaul functions in scripts/set directory.
Rik <rik@octave.org>
parents:
18857
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371 %!error <invalid option> unique (1, "middle") |
d00f6b09258f
Overhaul functions in scripts/set directory.
Rik <rik@octave.org>
parents:
18857
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372 %!error <invalid option> unique ({"a", "b", "c"}, "UnknownOption") |
d00f6b09258f
Overhaul functions in scripts/set directory.
Rik <rik@octave.org>
parents:
18857
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373 %!error <invalid option> unique ({"a", "b", "c"}, "UnknownOption1", "UnknownOption2") |
d00f6b09258f
Overhaul functions in scripts/set directory.
Rik <rik@octave.org>
parents:
18857
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374 %!error <invalid option> unique ({"a", "b", "c"}, "rows", "UnknownOption2") |
d00f6b09258f
Overhaul functions in scripts/set directory.
Rik <rik@octave.org>
parents:
18857
diff
changeset
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375 %!error <invalid option> unique ({"a", "b", "c"}, "UnknownOption1", "last") |
d00f6b09258f
Overhaul functions in scripts/set directory.
Rik <rik@octave.org>
parents:
18857
diff
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376 %!warning <"rows" is ignored for cell arrays> unique ({"1"}, "rows"); |
27291
c4f9a0f097a3
unique.m: Add new option "stable" to control output ordering.
Rik <rik@octave.org>
parents:
27236
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377 %!warning <third output J is not yet implemented> |
c4f9a0f097a3
unique.m: Add new option "stable" to control output ordering.
Rik <rik@octave.org>
parents:
27236
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378 %! [y,i,j] = unique ([2,1], "stable"); |
c4f9a0f097a3
unique.m: Add new option "stable" to control output ordering.
Rik <rik@octave.org>
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379 %! assert (j, []); |