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annotate scripts/elfun/secd.m @ 33623:4517f929c59d bytecode-interpreter tip

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maint: Merge default to bytecode-interpreter
author Arun Giridhar <arungiridhar@gmail.com>
date Fri, 24 May 2024 16:22:41 -0400
parents 2e484f9f1f18
children
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1 ########################################################################
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2 ##
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3 ## Copyright (C) 2006-2024 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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25
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26 ## -*- texinfo -*-
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27 ## @deftypefn {} {@var{y} =} secd (@var{x})
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28 ## Compute the secant for each element of @var{x} in degrees.
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29 ## @seealso{asecd, sec}
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30 ## @end deftypefn
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31
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32 function y = secd (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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37
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38 y = 1 ./ cosd (x);
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39
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40 endfunction
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41
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43 %!assert (secd (0:10:80), sec (pi*[0:10:80]/180), -10*eps)
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44 %!assert (secd ([0, 180, 360]) != Inf)
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45 %!assert (secd ([90, 270]) == Inf)
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46
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47 %!error <Invalid call> secd ()