maint: Use Octave coding conventions for cuddling parentheses in scripts directory * lin2mu.m, loadaudio.m, wavread.m, accumarray.m, bicubic.m, celldisp.m, colon.m, cplxpair.m, dblquad.m, divergence.m, genvarname.m, gradient.m, int2str.m, interp1.m, interp1q.m, interp2.m, interpn.m, loadobj.m, nthargout.m, __isequal__.m, __splinen__.m, quadgk.m, quadl.m, quadv.m, rat.m, rot90.m, rotdim.m, saveobj.m, subsindex.m, triplequad.m, delaunay3.m, griddata.m, inpolygon.m, tsearchn.m, voronoi.m, get_first_help_sentence.m, which.m, gray2ind.m, pink.m, dlmwrite.m, strread.m, textread.m, textscan.m, housh.m, ishermitian.m, issymmetric.m, krylov.m, logm.m, null.m, rref.m, compare_versions.m, copyfile.m, dump_prefs.m, edit.m, fileparts.m, getappdata.m, isappdata.m, movefile.m, orderfields.m, parseparams.m, __xzip__.m, rmappdata.m, setappdata.m, swapbytes.m, unpack.m, ver.m, fminbnd.m, fminunc.m, fsolve.m, glpk.m, lsqnonneg.m, qp.m, sqp.m, configure_make.m, copy_files.m, describe.m, get_description.m, get_forge_pkg.m, install.m, installed_packages.m, is_architecture_dependent.m, load_package_dirs.m, print_package_description.m, rebuild.m, repackage.m, save_order.m, shell.m, allchild.m, ancestor.m, area.m, axes.m, axis.m, clabel.m, close.m, colorbar.m, comet.m, comet3.m, contour.m, cylinder.m, ezmesh.m, ezsurf.m, findobj.m, fplot.m, hist.m, isocolors.m, isonormals.m, isosurface.m, isprop.m, legend.m, mesh.m, meshz.m, pareto.m, pcolor.m, peaks.m, plot3.m, plotmatrix.m, plotyy.m, polar.m, print.m, __add_datasource__.m, __add_default_menu__.m, __axes_limits__.m, __bar__.m, __clabel__.m, __contour__.m, __errcomm__.m, __errplot__.m, __ezplot__.m, __file_filter__.m, __fltk_print__.m, __ghostscript__.m, __gnuplot_print__.m, __go_draw_axes__.m, __go_draw_figure__.m, __interp_cube__.m, __marching_cube__.m, __patch__.m, __pie__.m, __plt__.m, __print_parse_opts__.m, __quiver__.m, __scatter__.m, __stem__.m, __tight_eps_bbox__.m, __uigetdir_fltk__.m, __uigetfile_fltk__.m, __uiputfile_fltk__.m, quiver.m, quiver3.m, rectangle.m, refreshdata.m, ribbon.m, scatter.m, semilogy.m, shading.m, slice.m, subplot.m, surface.m, surfl.m, surfnorm.m, text.m, uigetfile.m, uiputfile.m, whitebg.m, deconv.m, mkpp.m, pchip.m, polyaffine.m, polyder.m, polygcd.m, polyout.m, polyval.m, ppint.m, ppjumps.m, ppval.m, residue.m, roots.m, spline.m, splinefit.m, addpref.m, getpref.m, setpref.m, ismember.m, setxor.m, arch_fit.m, arch_rnd.m, arch_test.m, autoreg_matrix.m, diffpara.m, fftconv.m, filter2.m, hanning.m, hurst.m, periodogram.m, triangle_sw.m, sinc.m, spectral_xdf.m, spencer.m, stft.m, synthesis.m, unwrap.m, yulewalker.m, bicgstab.m, gmres.m, pcg.m, pcr.m, __sprand_impl__.m, speye.m, spfun.m, sprandn.m, spstats.m, svds.m, treelayout.m, treeplot.m, bessel.m, factor.m, legendre.m, perms.m, primes.m, magic.m, toeplitz.m, corr.m, cov.m, mean.m, median.m, mode.m, qqplot.m, quantile.m, ranks.m, zscore.m, logistic_regression_likelihood.m, bartlett_test.m, chisquare_test_homogeneity.m, chisquare_test_independence.m, kolmogorov_smirnov_test.m, run_test.m, u_test.m, wilcoxon_test.m, z_test.m, z_test_2.m, bin2dec.m, dec2base.m, mat2str.m, strcat.m, strchr.m, strjust.m, strtok.m, substr.m, untabify.m, assert.m, demo.m, example.m, fail.m, speed.m, test.m, now.m: Use Octave coding conventions for cuddling parentheses in scripts directory.

## Copyright (C) 2008-2012 Jaroslav Hajek
## Copyright (C) 2000, 2006-2007 Paul Kienzle
##
## 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} {} setxor (@var{a}, @var{b})
## @deftypefnx {Function File} {} setxor (@var{a}, @var{b}, "rows")
## @deftypefnx {Function File} {[@var{c}, @var{ia}, @var{ib}] =} setxor (@var{a}, @var{b})
##
## Return the elements exclusive to @var{a} or @var{b}, sorted in ascending
## order.  If @var{a} and @var{b} are both column vectors return a column
## vector, otherwise return a row vector.
## @var{a}, @var{b} may be cell arrays of string(s).
##
## With three output arguments, return index vectors @var{ia} and @var{ib}
## such that @code{a(ia)} and @code{b(ib)} are disjoint sets whose union
## is @var{c}.
##
## @seealso{unique, union, intersect, setdiff, ismember}
## @end deftypefn

function [c, ia, ib] = setxor (a, b, varargin)

  if (nargin < 2 || nargin > 3)
    print_usage ();
  endif

  [a, b] = validargs ("setxor", a, b, varargin{:});

  ## Form A and B into sets.
  if (nargout > 1)
    [a, ia] = unique (a, varargin{:});
    [b, ib] = unique (b, varargin{:});
  else
    a = unique (a, varargin{:});
    b = unique (b, varargin{:});
  endif

  if (isempty (a))
    c = b;
  elseif (isempty (b))
    c = a;
  else
    ## Reject duplicates.
    if (nargin > 2)
      na = rows (a); nb = rows (b);
      [c, i] = sortrows ([a; b]);
      n = rows (c);
      idx = find (all (c(1:n-1) == c(2:n), 2));
      if (! isempty (idx))
        c([idx, idx+1],:) = [];
        i([idx, idx+1],:) = [];
      endif
    else
      na = numel (a); nb = numel (b);
      [c, i] = sort ([a(:); b(:)]);
      n = length (c);
      if (iscell (c))
        idx = find (strcmp (c(1:n-1), c(2:n)));
      else
        idx = find (c(1:n-1) == c(2:n));
      endif
      if (! isempty (idx))
        c([idx, idx+1]) = [];
        i([idx, idx+1]) = [];
      endif
      if (size (a, 1) == 1 || size (b, 1) == 1)
        c = c.';
      endif
    endif
  endif
  if (nargout > 1)
    ia = ia(i(i <= na));
    ib = ib(i(i > na) - na);
  endif

endfunction


%!assert (setxor ([1,2,3],[2,3,4]),[1,4])
%!assert (setxor ({'a'}, {'a', 'b'}), {'b'})
%!test
%! a = [3, 1, 4, 1, 5];  b = [1, 2, 3, 4];
%! [y, ia, ib] = setxor (a, b.');
%! assert (y, [2, 5]);
%! assert (y, sort ([a(ia), b(ib)]));