--- /dev/null
+## Copyright (C) 2010 VZLU Prague
+##
+## This program 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.
+##
+## This program 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} ctranspose (@var{x})
+## Returns the conjugate transpose of a block sparse matrix @var{x}.
+## @end deftypefn
+
+function y = ctranspose (x)
+ y.siz = x.siz(2:-1:1);
+ y.bsiz = x.bsiz(2:-1:1);
+ [y.j,idx] = sort (x.i);
+ y.i = x.j(idx);
+ y.sv = conj (permute (x.sv(:,:,idx), [2,1,3]));
+endfunction