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snapshot 3.5.90 * configure.ac (AC_INIT): Version is now 3.5.90. (OCTAVE_API_VERSION_NUMBER): Now 46. (OCTAVE_RELEASE_DATE): Now 2011-12-11.
author John W. Eaton <jwe@octave.org>
date Sun, 11 Dec 2011 23:18:31 -0500
parents fd0a3ac60b0e
children 72c96de7a403
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fd0a3ac60b0e update copyright notices
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1 ## Copyright (C) 1994-2011 John W. Eaton
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2 ##
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3 ## This file is part of Octave.
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4 ##
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5 ## Octave is free software; you can redistribute it and/or modify it
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6 ## under the terms of the GNU General Public License as published by
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7 ## the Free Software Foundation; either version 3 of the License, or (at
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8 ## your option) any later version.
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9 ##
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10 ## Octave is distributed in the hope that it will be useful, but
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 ## General Public License for more details.
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14 ##
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15 ## You should have received a copy of the GNU General Public License
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16 ## along with Octave; see the file COPYING. If not, see
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17 ## <http://www.gnu.org/licenses/>.
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18
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19 ## -*- texinfo -*-
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20 ## @deftypefn {Mapping Function} {} acsch (@var{x})
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21 ## Compute the inverse hyperbolic cosecant of each element of @var{x}.
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22 ## @seealso{csch}
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23 ## @end deftypefn
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25 ## Author: jwe
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26
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27 function y = acsch (x)
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29 if (nargin != 1)
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30 print_usage ();
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31 endif
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33 y = asinh (1 ./ x);
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35 endfunction
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37 %!test
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38 %! v = [pi/2*i, -pi/2*i];
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39 %! x = [-i, i];
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40 %! assert(all (abs (acsch (x) - v) < sqrt (eps)));
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42 %!error acsch ();
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44 %!error acsch (1, 2);
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