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annotate scripts/elfun/asech.m @ 33617:ec2635a02328 bytecode-interpreter tip

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maint: Merge default to bytecode-interpreter.
author Markus Mützel <markus.muetzel@gmx.de>
date Tue, 21 May 2024 18:29:03 +0200
parents 2e484f9f1f18
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 ########################################################################
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2 ##
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3 ## Copyright (C) 1994-2024 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/>.
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7 ##
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8 ## This file is part of Octave.
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9 ##
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10 ## Octave is free software: you can redistribute it and/or modify it
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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.
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14 ##
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15 ## Octave is distributed in the hope that it will be useful, but
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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.
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19 ##
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20 ## You should have received a copy of the GNU General Public License
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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 ########################################################################
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26 ## -*- texinfo -*-
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27 ## @deftypefn {} {@var{y} =} asech (@var{x})
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28 ## Compute the inverse hyperbolic secant of each element of @var{x}.
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29 ## @seealso{sech}
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30 ## @end deftypefn
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31
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32 function y = asech (x)
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33
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34 if (nargin < 1)
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35 print_usage ();
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36 endif
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38 y = acosh (1 ./ x);
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39
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40 endfunction
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41
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43 %!testif ; ! ismac ()
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44 %! v = [0, pi*i];
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45 %! x = [1, -1];
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46 %! assert (asech (x), v, sqrt (eps));
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47
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48 %!test <*52627>
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49 %! ## Same test code as above, but intended only for test statistics on Mac.
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50 %! ## Mac trig/hyperbolic functions have huge tolerances.
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51 %! if (! ismac ()), return; endif
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52 %! v = [0, pi*i];
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53 %! x = [1, -1];
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54 %! assert (asech (x), v, sqrt (eps));
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56 %!error <Invalid call> asech ()