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annotate scripts/elfun/atand.m @ 25054:6652d3823428 stable

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maint: Update copyright dates in all source files.
author John W. Eaton <jwe@octave.org>
date Fri, 30 Mar 2018 09:19:05 -0400
parents 194eb4bd202b
children 00f796120a6d
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6652d3823428 maint: Update copyright dates in all source files.
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1 ## Copyright (C) 2006-2018 David Bateman
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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
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8 ## (at 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
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13 ## GNU 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 ## <https://www.gnu.org/licenses/>.
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18
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19 ## -*- texinfo -*-
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20 ## @deftypefn {} {} atand (@var{x})
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21 ## Compute the inverse tangent in degrees for each element of @var{x}.
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22 ## @seealso{tand, atan}
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23 ## @end deftypefn
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24
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25 ## Author: David Bateman <dbateman@free.fr>
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26
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27 function y = atand (x)
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28
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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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32
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33 y = 180 ./ pi .* atan (x);
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34
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35 endfunction
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36
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38 %!assert (atand (0:10:90), 180/pi * atan (0:10:90), -10*eps)
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39
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40 %!error atand ()
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41 %!error atand (1, 2)