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- ## Copyright (C) 1996 John W. Eaton
- ##
- ## This file is part of Octave.
- ##
- ## Octave is free software; you can redistribute it and/or modify it
- ## under the terms of the GNU General Public License as published by
- ## the Free Software Foundation; either version 2, or (at your option)
- ## any later version.
- ##
- ## Octave is distributed in the hope that it will be useful, but
- ## WITHOUT ANY WARRANTY; without even the implied warranty of
- ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- ## General Public License for more details.
- ##
- ## You should have received a copy of the GNU General Public License
- ## along with Octave; see the file COPYING. If not, write to the Free
- ## Software Foundation, 59 Temple Place - Suite 330, Boston, MA
- ## 02111-1307, USA.
-
- ## usage: mean (a)
- ##
- ## For vector arguments, return the mean the values.
- ##
- ## For matrix arguments, return a row vector containing the mean for
- ## each column.
- ##
- ## See also: median, std
-
- ## Author: jwe
-
- function retval = mean (a)
-
- if (nargin != 1)
- usage ("mean (a)");
- endif
-
- [nr, nc] = size (a);
- if (nr == 1 || nc == 1)
- retval = sum (a) / length (a);
- elseif (nr > 0 && nc > 0)
- retval = sum (a) / nr;
- else
- error ("mean: invalid matrix argument");
- endif
-
- endfunction
-