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unique_stable.m
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<<<<<<< HEAD
function [C, ia, ic] = unique_stable (A, varargin)
if (nargin < 1)
print_usage ();
elseif (!(isnumeric (A) || islogical (A) || ischar (A) || iscellstr (A)))
error ("unique: A must be an array or cell array of strings");
endif
if (nargin > 1)
## parse options
if (! iscellstr (varargin))
error ("unique: options must be strings");
endif
optrows = any (strcmp ("rows", varargin));
optfirst = any (strcmp ("first", varargin));
optlast = any (strcmp ("last", varargin));
optstable = any (strcmp ("stable", varargin));
optsorted = any (strcmp ("sorted", varargin));
optlegacy = any (strcmp ("legacy", varargin));
if (optfirst && optlast)
error ('unique: cannot specify both "first" and "last"');
elseif (optstable && optlast)
error ("unique: cannot specify 'stable' with 'last'");
elseif (optfirst + optlast + optrows...
+ optstable + optsorted + optlegacy != nargin-1)
error ("unique: invalid option");
endif
if (optrows && iscellstr (A))
warning ('unique: "rows" is ignored for cell arrays');
optrows = false;
endif
if optlegacy && ~(optfirst || optlast)
optlast = true;
elseif ~optlegacy && (optfirst || optlast)
optlegacy = true;
endif
#default values
else
optrows = false;
optlast = false;
optstable = false;
optlegacy = false;
endif
if optrows
=======
function [C, ia, ic] = unique_stable (A, varargin)
if (nargin < 1)
print_usage ();
elseif (!(isnumeric (A) || islogical (A) || ischar (A) || iscellstr (A)))
error ("unique: A must be an array or cell array of strings");
elseif (nargin > 1 && ! iscellstr (varargin))
error ("unique: options must all be strings");
endif
optrows = false;
optfirst = false;
optlast = false;
optstable = false;
optsorted = false;
optlegacy = false;
for o = varargin'
switch (tolower (o{1}))
case "rows", optrows = true;
case "first", optfirst = true;
case "last", optlast = true;
case "stable", optstable = true;
case "sorted", optsorted = true;
case "legacy", optlegacy = true;
otherwise,
error ("unique: invalid option %s", o{1});
endswitch
endfor
if (optfirst && optlast)
error ("unique: options ""first"" and ""last"" are mutually exclusive");
elseif (optstable && optlast)
error ("unique: options ""first"" and ""last"" are mutually exclusive");
elseif (optrows && iscellstr (A))
warning ("unique: option ""rows"" is ignored for cell arrays");
optrows = false;
endif
if optrows
>>>>>>> d8ea86a78f9b3bf04c3f7328465407b7167a4186
range = size(A,1);
C = NaN(size(A));
ia = NaN(size(A,1),1);
ic = NaN(size(A,1),1);
else
range = numel(A);
if isempty(A)
C = [];
break
elseif optlegacy && (size(A,1) < size(A,2))
C = NaN(1,numel(A));
ia = NaN(1,numel(A));
ic = NaN(1,numel(A));
else
ia = NaN(numel(A),1);
ic = NaN(numel(A),1);
<<<<<<< HEAD
C = NaN(numel(A),1);
endif
endif
if optlast
dir = range:-1:1;
else
dir = 1:range;
endif
index = 1;
if optrows
for x = dir
for y = 1:index
if (sum(C(y,:)==A(x,:)) == length(A(x,:))) ||...
(strcmp(C(y,:),A(x,:)))
ic(x) = y;
break
elseif y == index
C(index,:) = A(x,:);
ia(index) = x;
ic(x) = index;
index += 1;
endif
endfor
endfor
C = C(1:index-1,:);
ia = ia(1:index-1);
if optstable == false
[C, sortIndex] = sortrows(C);
ia = ia(sortIndex);
ic = sortIndex(ic);
endif
else
for x = dir
if ~any(C == A(x)) || strcmp(C,A(x))
C(index) = A(x);
ia(index) = x;
ic(x) = index;
index += 1;
else
[~,pos] = min(abs(C-A(x)));
ic(x) = pos;
endif
endfor
C = C(1:index-1);
ia = ia(1:index-1);
if optstable == false
[C, sortIndex] = sort(C);
ia = ia(sortIndex);
ic = sortIndex(ic);
endif
if (~optlegacy) && (any(size(A) == 1))
C = C';
endif
endif
endfunction
%!assert (unique_stable ([1 1 2; 1 2 1; 1 1 2]), [1;2])
%!assert (unique_stable ([1 1 2; 1 0 1; 1 1 2],"rows"), [1 0 1; 1 1 2])
%!assert (unique_stable ([]), [])
%!assert (unique_stable ([1]), [1])
%!assert (unique_stable ([1 2]), [1 2])
%!assert (unique_stable ([1;2]), [1 2])
%!assert (unique_stable ([1;2],'legacy'), [1;2])
%!assert (unique_stable ([1,NaN,Inf,NaN,Inf]), [1,Inf,NaN,NaN])
%!assert (unique_stable ({"Foo","Bar","Foo"}), {"Bar","Foo"})
%!assert (unique_stable ({"Foo","Bar","FooBar"}'), {"Bar","Foo","FooBar"}')
%!assert (unique_stable (zeros (1,0)), zeros (0,1))
%!assert (unique_stable (zeros (1,0), "rows"), zeros (1,0))
%!assert (unique_stable (cell (1,0)), cell (0,1))
%!assert (unique_stable ({}), {})
%!assert (unique_stable ([1,2,2,3,2,4], "rows"), [1,2,2,3,2,4])
%!assert (unique_stable ([1,2,2,3,2,4]), [1,2,3,4])
%!assert (unique_stable ([1,2,2,3,2,4]', "rows"), [1,2,3,4]')
%!assert (unique_stable (sparse ([2,0;2,0])), [0,2]')
%!assert (unique_stable (sparse ([1,2;2,3])), [1,2,3]')
%!assert (unique_stable ([1,2,2,3,2,4]', "rows"), [1,2,3,4]')
%!assert (unique_stable (single ([1,2,2,3,2,4]), "rows"), single ([1,2,2,3,2,4]))
%!assert (unique_stable (single ([1,2,2,3,2,4])), single ([1,2,3,4]))
%!assert (unique_stable (single ([1,2,2,3,2,4]'), "rows"), single ([1,2,3,4]'))
%!assert (unique_stable (uint8 ([1,2,2,3,2,4]), "rows"), uint8 ([1,2,2,3,2,4]))
%!assert (unique_stable (uint8 ([1,2,2,3,2,4])), uint8 ([1,2,3,4]))
%!assert (unique_stable (uint8 ([1,2,2,3,2,4]'), "rows"), uint8 ([1,2,3,4]'))
%!test
%! [a,i,j] = unique_stable ([1,1,2,3,3,3,4]);
%! assert (a, [1,2,3,4]);
%! assert (i, [2,3,6,7]);
%! assert (j, [1,1,2,3,3,3,4]);
%!
%!test
%! [a,i,j] = unique_stable ([1,1,2,3,3,3,4]', "first");
%! assert (a, [1,2,3,4]');
%! assert (i, [1,3,4,7]');
%! assert (j, [1,1,2,3,3,3,4]');
%!
%!test
%! [a,i,j] = unique_stable ({"z"; "z"; "z"});
%! assert (a, {"z"});
%! assert (i, [3]');
%! assert (j, [1;1;1]);
%!
%!test
%! A = [1,2,3;1,2,3];
%! [a,i,j] = unique_stable (A, "rows");
%! assert (a, [1,2,3]);
%! assert (A(i,:), a);
%! assert (a(j,:), A);
## Test input validation
%!error unique_stable ()
%!error <A must be an array or cell array of strings> unique_stable ({1})
%!error <options must be strings> unique_stable (1, 2)
%!error <cannot specify both "first" and "last"> unique_stable (1, "first", "last")
%!error <invalid option> unique_stable (1, "middle")
%!error <invalid option> unique_stable ({"a", "b", "c"}, "UnknownOption")
%!error <invalid option> unique_stable ({"a", "b", "c"}, "UnknownOption1", "UnknownOption2")
%!error <invalid option> unique_stable ({"a", "b", "c"}, "rows", "UnknownOption2")
%!error <invalid option> unique_stable ({"a", "b", "c"}, "UnknownOption1", "last")
%!warning <"rows" is ignored for cell arrays> unique_stable ({"1"}, "rows");
=======
if ~optlegacy && (any(size(A) == 1)
C = NaN(1,numel(A));
else
C = NaN(numel(A),1);
endif
endif
endif
if optlast
dir = range:-1:1;
else
dir = 1:range;
endif
index = 1;
if optrows
for x = dir
for y = 1:index
if (sum(C(y,:)==A(x,:)) == length(A(x,:))) ||...
(strcmp(C(y,:),A(x,:)))
ic(x) = y;
break
elseif y == index
C(index,:) = A(x,:);
ia(index) = x;
ic(x) = index;
index += 1;
endif
endfor
endfor
C = C(1:index-1,:);
ia = ia(1:index-1);
if optstable == false
[C, sortIndex] = sortrows(C);
ia = ia(sortIndex);
ic = sortIndex(ic);
endif
else
for x = dir
if ~any(C == A(x)) || strcmp(C,A(x))
C(index) = A(x);
ia(index) = x;
ic(x) = index;
index += 1;
else
[~,pos] = min(abs(C-A(x)));
ic(x) = pos;
endif
endfor
C = C(1:index-1);
ia = ia(1:index-1);
if optstable == false
[C, sortIndex] = sort(C);
ia = ia(sortIndex);
ic = sortIndex(ic);
endif
endif
endfunction
%!assert (unique_stable ([1 1 2; 1 2 1; 1 1 2]), [1;2])
%!assert (unique_stable ([1 1 2; 1 0 1; 1 1 2],"rows"), [1 0 1; 1 1 2])
%!assert (unique_stable ([]), [])
%!assert (unique_stable ([1]), [1])
%!assert (unique_stable ([1 2]), [1 2])
%!assert (unique_stable ([1;2]), [1 2])
%!assert (unique_stable ([1;2],'legacy'), [1;2])
%!assert (unique_stable ([1,NaN,Inf,NaN,Inf]), [1,Inf,NaN,NaN])
%!assert (unique_stable ({"Foo","Bar","Foo"}), {"Bar","Foo"})
%!assert (unique_stable ({"Foo","Bar","FooBar"}'), {"Bar","Foo","FooBar"}')
%!assert (unique_stable (zeros (1,0)), zeros (0,1))
%!assert (unique_stable (zeros (1,0), "rows"), zeros (1,0))
%!assert (unique_stable (cell (1,0)), cell (0,1))
%!assert (unique_stable ({}), {})
%!assert (unique_stable ([1,2,2,3,2,4], "rows"), [1,2,2,3,2,4])
%!assert (unique_stable ([1,2,2,3,2,4]), [1,2,3,4])
%!assert (unique_stable ([1,2,2,3,2,4]', "rows"), [1,2,3,4]')
%!assert (unique_stable (sparse ([2,0;2,0])), [0,2]')
%!assert (unique_stable (sparse ([1,2;2,3])), [1,2,3]')
%!assert (unique_stable ([1,2,2,3,2,4]', "rows"), [1,2,3,4]')
%!assert (unique_stable (single ([1,2,2,3,2,4]), "rows"), single ([1,2,2,3,2,4]))
%!assert (unique_stable (single ([1,2,2,3,2,4])), single ([1,2,3,4]))
%!assert (unique_stable (single ([1,2,2,3,2,4]'), "rows"), single ([1,2,3,4]'))
%!assert (unique_stable (uint8 ([1,2,2,3,2,4]), "rows"), uint8 ([1,2,2,3,2,4]))
%!assert (unique_stable (uint8 ([1,2,2,3,2,4])), uint8 ([1,2,3,4]))
%!assert (unique_stable (uint8 ([1,2,2,3,2,4]'), "rows"), uint8 ([1,2,3,4]'))
%!test
%! [a,i,j] = unique_stable ([1,1,2,3,3,3,4]);
%! assert (a, [1,2,3,4]);
%! assert (i, [2,3,6,7]);
%! assert (j, [1,1,2,3,3,3,4]);
%!
%!test
%! [a,i,j] = unique_stable ([1,1,2,3,3,3,4]', "first");
%! assert (a, [1,2,3,4]');
%! assert (i, [1,3,4,7]');
%! assert (j, [1,1,2,3,3,3,4]');
%!
%!test
%! [a,i,j] = unique_stable ({"z"; "z"; "z"});
%! assert (a, {"z"});
%! assert (i, [3]');
%! assert (j, [1;1;1]);
%!
%!test
%! A = [1,2,3;1,2,3];
%! [a,i,j] = unique_stable (A, "rows");
%! assert (a, [1,2,3]);
%! assert (A(i,:), a);
%! assert (a(j,:), A);
## Test input validation
%!error unique_stable ()
%!error <X must be an array or cell array of strings> unique_stable ({1})
%!error <options must be strings> unique_stable (1, 2)
%!error <cannot specify both "first" and "last"> unique_stable (1, "first", "last")
%!error <invalid option> unique_stable (1, "middle")
%!error <invalid option> unique_stable ({"a", "b", "c"}, "UnknownOption")
%!error <invalid option> unique_stable ({"a", "b", "c"}, "UnknownOption1", "UnknownOption2")
%!error <invalid option> unique_stable ({"a", "b", "c"}, "rows", "UnknownOption2")
%!error <invalid option> unique_stable ({"a", "b", "c"}, "UnknownOption1", "last")
%!warning <"rows" is ignored for cell arrays> unique_stable ({"1"}, "rows");
>>>>>>> d8ea86a78f9b3bf04c3f7328465407b7167a4186