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annotate scripts/elfun/cot.m @ 20830:b65888ec820e draft default tip gccjit

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dmalcom gcc jit import
author Stefan Mahr <dac922@gmx.de>
date Fri, 27 Feb 2015 16:59:36 +0100
parents 4197fc428c7d
children
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4197fc428c7d maint: Update copyright notices for 2015.
John W. Eaton <jwe@octave.org>
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1 ## Copyright (C) 1994-2015 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} {} cot (@var{x})
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21 ## Compute the cotangent for each element of @var{x} in radians.
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22 ## @seealso{acot, cotd, coth}
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23 ## @end deftypefn
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25 ## Author: jwe
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27 function y = cot (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 = 1 ./ tan (x);
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35 endfunction
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38 %!test
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39 %! rt2 = sqrt (2);
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40 %! rt3 = sqrt (3);
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41 %! x = [pi/6, pi/4, pi/3, pi/2, 2*pi/3, 3*pi/4, 5*pi/6];
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42 %! v = [rt3, 1, rt3/3, 0, -rt3/3, -1, -rt3];
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43 %! assert (cot (x), v, sqrt (eps));
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45 %!error cot ()
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46 %!error cot (1, 2)
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