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annotate scripts/statistics/base/cloglog.m @ 20177:15e5eb7a0c1d

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make dist: add updated zoom images to EXTRADIST (bug #44579) * libgui/graphics/module.mk: add graphics/images/zoom-in.png, graphics/images/zoom-out.png, remove graphics/images/zoom.png
author John Donoghue
date Thu, 19 Mar 2015 08:37:47 -0400
parents 9fc020886ae9
children d9341b422488
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4197fc428c7d maint: Update copyright notices for 2015.
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1 ## Copyright (C) 1995-2015 Kurt Hornik
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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 {Function File} {} cloglog (@var{x})
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21 ## Return the complementary log-log function of @var{x}, defined as
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22 ## @tex
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23 ## $$
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24 ## {\rm cloglog}(x) = - \log (- \log (x))
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25 ## $$
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26 ## @end tex
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27 ## @ifnottex
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28 ##
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29 ## @example
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30 ## cloglog (x) = - log (- log (@var{x}))
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31 ## @end example
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32 ##
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33 ## @end ifnottex
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34 ## @end deftypefn
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35
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36 ## Author: KH <Kurt.Hornik@wu-wien.ac.at>
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37 ## Description: Complementary log-log function
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38
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39 function y = cloglog (x)
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41 if (nargin != 1)
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42 print_usage ();
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43 endif
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44
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45 y = - log (- log (x));
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46
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47 endfunction
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50 %!assert (cloglog (0), -Inf)
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51 %!assert (cloglog (1), Inf)
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52 %!assert (cloglog (1/e), 0)
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54 ## Test input validation
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55 %!error cloglog ()
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56 %!error cloglog (1, 2)
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