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Add tests for ifftshift.m
author Robert T. Short <octave@phaselockedsystems.com.com>
date Sat, 26 Mar 2011 06:50:12 -0700
parents fd0a3ac60b0e
children 72c96de7a403
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fd0a3ac60b0e update copyright notices
John W. Eaton <jwe@octave.org>
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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} {} csc (@var{x})
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ad20b967e1c9 Update section 17.3 (Trigonometry) of arith.txi
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21 ## Compute the cosecant for each element of @var{x} in radians.
ad20b967e1c9 Update section 17.3 (Trigonometry) of arith.txi
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22 ## @seealso{acsc, cscd, csch}
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23 ## @end deftypefn
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25 ## Author: jwe
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27 function y = csc (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 ./ sin(x);
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35 endfunction
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37 %!test
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38 %! rt2 = sqrt (2);
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39 %! rt3 = sqrt (3);
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40 %! x = [pi/6, pi/4, pi/3, pi/2, 2*pi/3, 3*pi/4, 5*pi/6];
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41 %! v = [2, rt2, 2*rt3/3, 1, 2*rt3/3, rt2, 2];
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42 %! assert(all (abs (csc (x) - v) < sqrt (eps)));
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44 %!error csc ();
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46 %!error csc (1, 2);
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