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1 ## Copyright (C) 1995, 1996, 1997, 1998, 2000, 2002, 2005, 2006, 2007 |
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2 ## Kurt Hornik |
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3 ## |
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4 ## This file is part of Octave. |
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5 ## |
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6 ## Octave is free software; you can redistribute it and/or modify it |
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7 ## under the terms of the GNU General Public License as published by |
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8 ## the Free Software Foundation; either version 3 of the License, or (at |
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9 ## your option) any later version. |
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10 ## |
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11 ## Octave is distributed in the hope that it will be useful, but |
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12 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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14 ## General Public License for more details. |
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15 ## |
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16 ## You should have received a copy of the GNU General Public License |
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17 ## along with Octave; see the file COPYING. If not, see |
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18 ## <http://www.gnu.org/licenses/>. |
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19 |
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20 ## -*- texinfo -*- |
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21 ## @deftypefn {Function File} {} logit (@var{p}) |
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22 ## For each component of @var{p}, return the logit of @var{p} defined as |
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23 ## @iftex |
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24 ## @tex |
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25 ## $$ |
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26 ## {\rm logit}(p) = \log\Big({p \over 1-p}\Big) |
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27 ## $$ |
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28 ## @end tex |
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29 ## @end iftex |
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30 ## @ifnottex |
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31 ## @example |
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32 ## logit(@var{p}) = log (@var{p} / (1-@var{p})) |
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33 ## @end example |
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34 ## @end ifnottex |
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35 ## @end deftypefn |
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36 |
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37 ## Author: KH <Kurt.Hornik@wu-wien.ac.at> |
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38 ## Description: Logit transformation |
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39 |
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40 function y = logit (p) |
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41 |
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42 if (nargin == 1) |
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43 y = logistic_inv (p); |
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44 else |
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45 print_usage (); |
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46 endif |
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47 |
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48 endfunction |
